JP2002264585A - Electron blackboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electron blackboard equipped with a function for reading image and character information drawn on a writing sheet and reproducing and recording (or storing and copying as digital images) the information and further with a function for allowing to record audio information in conference as memoranda and recording the audio information. SOLUTION: In the electron blackboard equipping with a writing sheet 12, on which image and character information such as characters, figures or the like can be drawn with water paint and erased with cloth or the like, an image reading means 13 for reading the image and character information drawn on the writing sheet, a means 14 for converting the read analog information to digital image information, a means 31 for once recording the digital image information and a connecting interface 3 for allowing to transmit and receive the digital image information, a microphone 21 and a means 31 for converting the analog audio information obtained from the microphone 21 to digital audio information and recording it once are equipped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electronic blackboard,
In detail, a function of reading the document information drawn on the writing sheet, reproducing and recording the document information, and further,
The present invention relates to an electronic blackboard capable of recording voice information during a meeting and having a function of recording the voice information. In particular, it is suitable for application to an electronic conference system.

[0002]

2. Description of the Related Art Generally, when a meeting is held, necessary items (characters, graphs, pictures, etc.) are written on a writing sheet of an electronic blackboard.
Is written with a water-based pen, and based on this, a style is reached in which discussions are repeated and conclusions are made. After the meeting, it is common to erase the written information on the writing sheet for recording new contents after the meeting or for the next person who uses the electronic blackboard. Met.

However, it may be necessary to reproduce the contents thus erased on a writing sheet of an electronic blackboard. For example, in a past meeting, it may be necessary to refer to the contents of the previous meeting. Also,
When returning to and resuming the conference at the end of the previous conference, the one at the end can be smoothly resumed.

To solve these problems, Japanese Patent Application Laid-Open No. 9-7669 describes
According to Japanese Patent Application Publication No. 4 (1999) -1999, a magnetic element display device that magnetically records two-dimensional information such as characters and figures and displays the recorded information is proposed.

[0005]

However, Japanese Patent Application Laid-Open No. 9-7 / 1997
The magnetic element display device proposed in US Pat.
A plurality of magnetic display elements having different colors on N and S poles are arranged to constitute a recording and display unit. That is, since a large number of magnetic recording elements are used, the cost becomes enormous, and it becomes considerably expensive as compared with a generally used writing sheet type electronic blackboard (whiteboard). Further, in order to make the image quality fine (higher image quality), the magnetic element must be made compact and the number thereof needs to be increased. In addition, a dedicated writing pen (magnetic pen) or an erasing tool must be used, which may burden the user (cost, ease of use, and breakage when desired).

In general, image information written on a writing sheet is read as analog image information by an image reading unit provided on an electronic blackboard, and is copied onto thermal paper. After the meeting, copy the necessary number of copies of the thermal paper with a plain paper copier and distribute it, or read the thermal recording paper with a scanner and convert it to a digital image, then save it as an electronic sentence on a hard disk etc. In addition, based on the document, the document is edited by word processing software or the like, and distributed by e-mail or the like.

[0007] To solve these problems, Japanese Patent Laid-Open Publication No.
No. 06754 discloses an OA having transmission and reception functions for each other.
It is composed of a board (electronic blackboard), a multifunctional copy machine, and a portable personal computer (or portable electronic notebook), and each device is provided with a detachable wired or wireless communication interface. Communication control between the devices is performed by a control device provided with an OA board. The original description on the OA board is automatically input by transfer from the multi-function copier, and the original is sent to each terminal at the same time. In each terminal, retouching and correction can be performed at the same time by pen input.
Transferred to A board and displayed. Finally, the data is transferred from the OA board to the multi-function copier, where it is printed and distributed to each person.

However, this OA board has a low expandability of the communication interface. For example, when installing this OA board, the user was connected to a copier or the like via a serial port, but later on a local area network (LAN)
When the installation of the OA board is completed and you want to connect to the LAN, you have to replace the OA board itself. In addition, since the OA board function cannot be operated via the LAN, there is a problem that remote control cannot be performed. Furthermore, the image described on the OA board is
There is a problem that the data is copied to a digital copying machine but cannot be stored as digital data.

In order to avoid the disadvantages of the above-mentioned Japanese Patent Application Laid-Open No. Hei 7-306754, Japanese Patent Application Laid-Open No. Hei 10-136140 discloses a writing sheet capable of freely drawing character or drawing information, and a drawing drawn on the writing sheet. An image sensor for reading the image information of the information, a control unit for reproducing and outputting the image information read by the information to a predetermined recording unit, and a PC (PC) / I / F (interface) and LA connected to LAN so that data can be transmitted and received
There has been proposed an electronic blackboard device that has an N.I / F and is capable of transmitting image information of writing information on a writing sheet to an external personal computer and a printer.

According to the technology disclosed in Japanese Patent Application Laid-Open No. Hei 10-136140, image information written on a writing sheet can be stored and copied as digital data, and furthermore, the electronic blackboard device can be operated by an external personal computer or the like. Not only that, the system is such that the control system of the electronic blackboard device can be freely improved using the connected personal computer. However, although this technique is certainly highly scalable, it may cause a problem that the usability is complicated for the user.

In addition, the techniques disclosed in Japanese Patent Application Laid-Open Nos. Hei 7-306754 and Hei 10-136140 cannot handle important audio information during a conference.

[0012] In order to solve the above-mentioned problems, the present invention provides a function of reading document information drawn on a writing sheet, and reproducing and recording the document information (storing / copying as a digital image). It is an object of the present invention to provide an electronic blackboard capable of recording a memo of voice information therein and having a function of recording the voice information. Furthermore, according to this electronic blackboard, it is possible to handle these document information and voice information as digital data, so that digital data can be exchanged using communication such as LAN, and finally, the electronic conference system can be used. It can also be used as an electronic blackboard with a voice memo that plays a part.

[0013]

According to a first aspect of the present invention, there is provided an electronic blackboard which can draw characters, drawings, and other writing information using a water-based pen, and uses a cloth or the like. A writing sheet capable of erasing the writing information, an image reading means for reading the writing information drawn on the writing sheet as analog image information, and a means for converting the read analog image information into digital image information, In an electronic blackboard provided with means for temporarily recording the digital image information and connection interface means for transmitting and receiving the digital image information, a microphone and analog audio information obtained from the microphone are converted into digital audio information. Means for temporarily recording the information.

According to a second aspect of the present invention, in the electronic blackboard according to the first aspect, the digital image information and the digital audio information can be stored in a removable recording medium.

According to a third aspect of the present invention, in the electronic blackboard according to the first or second aspect, a semiconductor memory is used as the removable recording medium.

According to a fourth aspect of the present invention, in the electronic blackboard according to the first or second aspect, the removable medium is a CD-R / RW (CD-Recordable / Rew).
ritable).

According to a fifth aspect of the present invention, in the electronic blackboard according to any one of the first to fourth aspects, a serial port or a digital image information is used as an interface unit for transmitting the digital image information. In addition, any one of a local area network, infrared communication, and wireless communication can be selected as an interface unit for transmitting and receiving digital voice information.

According to a sixth aspect of the present invention, in the electronic blackboard according to any one of the first to fifth aspects, the interface unit can be selected by simply inserting an expansion board.

According to a seventh aspect of the present invention, in the electronic whiteboard according to any one of the first to sixth aspects, a personal computer connected to the interface unit directly or via a local area network. It is characterized by being controllable from.

According to an eighth aspect of the present invention, there is provided the electronic blackboard according to any one of the first to seventh aspects, wherein the electronic blackboard is connected via a personal computer or a local area network connected to the interface unit. And drawing means for reproducing and drawing the digital image information received from the various terminal devices on the writing sheet.

According to a ninth aspect of the present invention, in the electronic blackboard according to any one of the first to eighth aspects, the writing sheet portion is provided with a rotation mechanism.

According to a tenth aspect of the present invention, in the electronic blackboard according to any one of the first to ninth aspects,
When storing or copying the digital image information,
The paper size can be specified.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and operation of an embodiment of the present invention will be described below in detail with reference to the drawings. <Embodiment 1> First, the basic configuration of a normal electronic blackboard will be described with reference to the block diagram of FIG. A normal electronic blackboard includes a driving unit 11 that drives a writing sheet 12, a writing sheet 12 that draws with a water-based pen or the like, an image reading unit 13 that reads drawn image information, and an analog image information that is read. A / D converter 14 for converting to digital image information, primary storage area 31 for temporarily storing the digital information, thermal paper recording unit 32 for recording digital image information on thermal paper, Do
The control unit 1 includes a control unit 1 having a CPU, a ROM, a RAM, and the like, and an operation panel 2 directly touched by a user.

The writing sheet 12 is wound on a roll as shown in FIG. 11 by a driving unit including a motor and gears (not shown) that conveys the writing sheet 12 at a predetermined speed, or as shown in FIG. It is driven by a belt conveyor as shown. Drawing information of figures and characters described is irradiated by a light source (not shown), and drawing information (reflected light) on the writing sheet 12 is line-sequentially scanned and photoelectrically converted into an analog image signal (the image reading unit 13). )
Thereafter, the image is binarized by the A / D conversion board 14 as a digital image signal. Generally, the operator copies image information on the writing sheet 12 from the operation panel 2,
Press the copy button on the operation panel 2. In response to an instruction from the operation panel 2, the control unit 1 performs the above-described series of operations, and the document information is copied to the thermal paper recording unit 32. The control unit 1 controls each unit of the apparatus so that a series of operations are sequentially performed.

The above-described ordinary electronic blackboard functions only at a predetermined installation location as a single device. The drawing contents on the writing sheet are mainly output only to the local printer of the thermal recording system, and the versatility of data and the storability are very poor. Further, the data recorded by the heat-sensing is usually copied and distributed by a plain paper copying machine without being distributed as it is.

(1) Configuration of First Embodiment Next, an electronic blackboard (hereinafter, referred to as a first embodiment) as one embodiment of the present invention will be described. FIG. 1 is a block diagram showing a functional configuration of an electronic blackboard according to one embodiment of the present invention.
FIG. 2 shows front, side, top, and back views of the electronic blackboard. The first embodiment (FIG. 1) mainly includes an operation / control / extension system, a document information processing system, a voice information processing system,
It also consists of a digital audio / document information storage / output system. Although the document information processing system is not much different from the above-described ordinary electronic blackboard, there is a difference that the primary storage area 31 is provided with a high-capacity random access memory (RAM). Its capacity is expandable from 8MB to 1024MB. There is no limit on the capacity, but if the capacity is too large, the processing capacity of the control CPU cannot keep up and the operability will be poor. In the first embodiment, 64 MB × 2 RAMs are mounted. One is for calligraphic information, and the other is for audio information.

The operation / control / expansion system includes a control unit 1 which is a microcomputer including a CPU, a ROM, a RAM, and the like, an operation panel 2 for operating the electronic blackboard of the first embodiment, and an external unit. The interface (I / F) is composed of an I / F unit 3 comprising a throttle attached to an expansion board. This expansion board mounting throttle is
The electronic blackboard according to the first embodiment is provided on the back surface and the front surface. The electronic whiteboard according to the first embodiment is provided with a connection interface with the personal computer 34 and / or the LAN, thereby sharing digital document information and making use of the digital document information in various ways. Also, I
The / F section 3 generally has expandability like a commercially available extended desktop personal computer. More specifically, an I / F directly connected to a personal computer or a digital copying machine such as a serial / parallel port, or a local area network such as Ethernet (registered trademark) or Token Ring (Token Ring). (LAN) and an interface connected to enable data transmission and reception. However, there is no problem in using electromagnetic waves (radio waves represented by radio waves or infrared rays) as communication means with the outside without being limited to those organically connected. When wireless or infrared light is used, the transmitting / receiving device 4 can be installed beside the main body of the electronic blackboard of this embodiment. FIG. 2 shows an example using wireless communication. When an infrared ray is used as the transmission / reception device 4, a photoelectric conversion device (device for converting an electric signal into an optical signal) is provided in the infrared oscillation device.

The voice processing information system includes a microphone (microphone) 21 for capturing voice, an amplifier 22 for amplifying the captured voice, and an A / D conversion board for converting the voice signal into a digital signal. 23. In the first embodiment, voice compression is not used because the main purpose is to record only important contents of the discussion as a memo, rather than to capture all the contents of the conference as voice. If it is necessary to take in the audio compression circuit 24, it is possible to add an audio compression circuit 24 as shown in the block diagram of FIG. As described above, since the electronic blackboard of the first embodiment is provided with the voice processing information system, it is possible to capture important discussion contents during a meeting as digital information, and to transfer the digital information to document information. It can be used in various ways as well.

The digital audio / document information storage / output system includes:
It comprises a removable recording medium 33 and its drive. As the removable recording medium 33, a semiconductor memory can be used. Semiconductor memory
It is sold under the trade names of commercially available memory cards, memory sticks, and the like. At present, the capacity is relatively small, several tens of megabytes, but it has begun to spread widely due to the small size of the semiconductor memory itself and the need for a drive system for reading. However, there is a problem that the cost of the semiconductor memory is high.

As the removable recording medium 33, a CD-R / RW (CD-Recordable / Rewritable) can be used. In particular, CD-R is expected to be a recording medium that can replace digital paper because any CD-ROM drive can read digital information. In addition, it is widely used due to its low price. Further, unlike a semiconductor memory, it has not only a relatively high capacity of 650 to 700 MB but also excellent portability and compatibility. The electronic blackboard of the first embodiment is
Since audio / video digital information can be recorded on the removable recording medium 33, the digital information can be carried freely. Needless to say, thermal paper recording is possible as in a conventional electronic blackboard.

(2) Operation of First Embodiment Next, the operation of the first embodiment will be described in detail with reference to FIGS. FIG. 3 is an enlarged view of a part of the operation panel 2 of FIG. When it is desired to leave important audio information as a memo during the conference, the REC button on the operation panel 2 in FIG. 3 is pressed. When the REC button is pressed, a command to switch on the microphone 21 is issued from the control unit 1. Analog audio information input from the microphone 21 is amplified by the amplifier 22 and becomes digital audio information by the A / D converter 23.
It is stored in a primary recording area (RAM) 31. When the operator presses the STOP button on the operation panel 2, the memo recording is stopped and a silent portion is automatically added at the end of the voice memo. This silence part plays an important role when it is stored in a removable recording medium 33 to be described later and is read by another personal computer or the like. The operator operates the operation panel 2
Press the PAUSE button to stop recording temporarily,
Unlike buttons, no silence is formed.

The primary recording area 31 has a small capacity of 64 MB.
Because it is composed of RAM, it will be filled with about 10 minutes of audio. Of course, if the voice compression circuit 24 is used together or the capacity of the primary recording area 31 is increased, it is possible to cope with the increase in capacity. However, since the electronic blackboard intended in the first embodiment is provided with the removable recording medium 33, it is more systematic to record the digital audio signal of the primary recording area 31 on the removable recording medium 33. This is advantageous in terms of efficiency. Also, an inexpensive electronic blackboard can be provided on the system. The method is as follows.
When the PY button is pressed, the digital audio information in the primary storage area 31 moves to the removable recording medium 33 with a silent portion as one section. For example, when digital audio information is written to a CD-R, it is written as a “* .WAV” file.
1.wav ”and“ BM02.wav ”are created.

With respect to the digital document information, the digital document information can be easily copied to the removable recording medium 33 by substantially the same operation. When the operator presses the COPY button of the operation button for BOARD on the operation panel 2 in FIG. 2, a drive command is issued from the control unit 1 to the drive unit 11. The writing sheet 12 is driven and illuminated by a light source (not shown), and the drawing information (reflected light) on the writing sheet 12 is line-sequentially scanned and photoelectrically converted into an analog image signal (image reading unit 13). The image is binarized by the A / D conversion board 14 as a digital image signal. The digital document information subjected to the binarization processing is temporarily recorded in the primary recording area 31, and thereafter, recorded and stored in the removable recording medium 33. The control unit 1 controls each unit of the apparatus so that a series of operations are sequentially performed.

As described above, according to the electronic blackboard of the first embodiment, the following effects are exhibited. -Since the writing sheet does not use a special display element such as magnetism, it can be manufactured relatively inexpensively.・ It can respond to the need to read the image information written on the writing sheet with high image quality. For example, the image quality is improved by increasing the number of pixels of the CCD of the read image reading unit or by increasing the scanning line density when driving the writing sheet.・ No special writing equipment is required. -It can be stored as digital audio / image information, not as a temporary record like a thermal paper record like a normal electronic blackboard. In other words, after the conference, digital audio and video information
Editing, distribution, etc. are possible using a personal computer. It also saves paper. -The expandability of the I / F is very high, and it can be connected to serial / parallel, local area networks, etc. For example, in a certain conference hall, when connecting to a digital copier serially, or when moving to another location, LAN
It is possible to connect to such a network.・ Removable recording media (semiconductor memory, CD-R / R
W), etc., the digital audio / document information of the conference can be copied to this removable recording medium and easily carried even without a personal computer at the conference location.・ Audio can be captured as digital information.

<Embodiment 2> FIG. 4 shows an embodiment 2 in which the electronic whiteboard of the present invention is connected to a local network LAN. When the electronic blackboard of the present invention is connected to a LAN as shown in FIG. 4, not only a personal computer and a digital copying machine but also various digital devices such as a facsimile, a scanner, and a digital camera can be connected. Is expanded, and an electronic conference system can be configured. In the second embodiment, an example is shown in which the electronic blackboard of the present invention is organically connected to a LAN, but an electromagnetic wave (for example, a radio wave or an infrared ray) may be used. It is also possible to connect by satellite or optical communication.

<Embodiment 3> FIG. 5 is a block diagram showing the structure of an electronic blackboard according to Embodiment 3 of the present invention. The electronic whiteboard according to the third embodiment allows various functions of the electronic whiteboard according to the third embodiment to be controlled from a personal computer (personal computer) connected to the I / F unit 3 directly or via a LAN.
FIG. 5 shows an example in which a laptop personal computer is directly connected to the I / F unit 3, and an example in which a floppy (registered trademark) disk drive and a CD-R drive are externally connected to the personal computer. .

In order to operate from such an external personal computer, the RE on the operation panel 2 of the electronic blackboard (FIG. 2)
Switch with the ON / OFF button of the MOTE section. Operator is REMOTE
When the ON button is pressed, all the operations described in the first embodiment can be performed from an externally connected personal computer. In this case, when the operation commands from both enter the control unit 1, the control unit 1 cannot determine which command should be given priority, so that the communication between the operation panel 2 of the electronic whiteboard and the control unit 1 becomes impossible. . Of course, the digital voice and document information of the first embodiment can be directly copied from the primary recording area 31 of the electronic blackboard to a floppy disk, CD-R / RW, MO (magneto-optical disk) or the like connected to the personal computer. It is possible. In addition, if control is performed from a PC connected to the LAN, remote control is possible, so control from a separate room is also possible.

<Embodiment 4> FIG. 6 is a schematic diagram of an embodiment 4 of the present invention having a plotter function on an electronic blackboard. Also,
FIG. 7 is a block diagram illustrating a functional configuration of the fourth embodiment.
In the fourth embodiment, a plotter function is added to the first embodiment, and an aqueous pen which can be driven freely in the X and Y directions is provided. The aqueous pen is also driven in the Z direction by an electromagnet (not shown). As shown in FIG. 7, digital information of characters and designs is transmitted from the external personal computer to the electronic blackboard of the fourth embodiment. The transmitted digital document information passes through the controller 1 and the CNC controller 4
Replaced by 1 with numerical information. X replaced,
The numerical information of Y and Z is transmitted to the plotter driving unit 42,
Write on the writing sheet 12 with an aqueous pen. Writing automatically by a plotter is convenient for materials prepared in advance. For example, when discussing the continuation of the contents of a meeting held on the previous day, the contents described on the writing sheet on the previous day can be directly restored by the plotter. Also, reprinting of materials prepared in advance can save time if this plotter device is used.

In the fourth embodiment, the water-based pen is used as a writing tool of the plotter, but the invention is not limited to this.
For example, there is no problem if ink can be drawn on a writing sheet by skipping ink like an ink jet printer and can be easily erased with a cloth or the like. Further, if a tool such as a cloth capable of erasing the water-based pen is provided instead of the water-based pen in the plotter section, the function can be changed to the automatic eraser function.

<Embodiment 5> Embodiment 5 of the present invention is such that the writing sheet portion of the electronic blackboard of the above-described embodiment can be rotated. FIG. 8 is a schematic diagram when the writing sheet portion of the electronic blackboard of the fifth embodiment is rotated. FIG. 9 is an enlarged view of a part of the operation panel 2 of the electronic blackboard according to the fifth embodiment. As shown in FIG. 8, the electronic blackboard of the fifth embodiment is designed to be freely rotatable up to 90 degrees. The writing sheet is fixed both horizontally and vertically,
When fixed, the state is notified to the control unit 1. That is,
In the control unit 1, whether the state of the writing sheet is currently horizontal,
Or, I always know if it's vertical. When the document information described on the writing sheet is copied to a removable recording medium or to a personal computer or digital copying machine connected to an I / F, the horizontal and vertical information and the information shown in FIG. It is possible to specify the paper size with the button. For example, the paper size in landscape
When you press A4 and copy on plain paper with a printer connected by serial, you can print in landscape orientation on A4 size paper.

[0041]

As described above, according to the present invention,
Important audio information during a conference can be recorded as digital audio information. Digital image information and digital audio information can be stored in a removable recording medium. When a semiconductor memory is used as a removable recording medium, the capacity is reduced to several tens.
Although it is relatively small, such as MB, the size of this semiconductor memory itself is small and it is convenient to carry. Also, since a drive system is not required for reading, even in places with vibrations (for example, in trains and cars) In addition, errors due to reading hardly occur (it is possible to reliably read digital voice / document information). On the other hand, when a CD-R / RW (CD-Recordable / Rewritable) is used as the removable recording medium, the CD-R is compatible with any CD-ROM drive because it can read digital information. easy. For example, there is a remarkable difference in the penetration rate of the CD-ROM drive as compared with the penetration rate of the reading device of the semiconductor memory. It is expected as a recording medium replacing paper. In addition, it is widely used due to its low price. Furthermore, unlike semiconductor memory, CD-R / RW has a relatively high capacity of 650-700MB,
It is possible to record a relatively large amount of digital voice / document information.

A serial port is used as a connection interface for transmitting digital image information, and a local area network (LAN) is used as an interface for transmitting and receiving digital image information and digital audio information.
), Since infrared communication and wireless communication methods can be selected, a certain conference hall has a scalable connection to a printer by serial connection, and a certain conference hall has a scalability such as connection to a LAN or the like. In addition, since this interface section can be selected simply by inserting an extension board, anyone can easily change the interface like a general-purpose extended personal computer.

Various functions of the electronic blackboard of the present invention can be remotely controlled from a personal computer (personal computer) connected directly to the connection interface or via a LAN. If the movement speed of digital information is improved due to the development of satellites and optical communication, it can be used as an electronic blackboard for electronic conference systems.

A drawing means (plotter function) for reproducing digital image information received from a personal computer connected to the connection interface or various terminal devices connected via a LAN on a writing sheet and drawing the image is provided. It is convenient to write the prepared material on this writing sheet.
For example, when discussing the continuation of the contents of a meeting held on the previous day, the contents described on the writing sheet on the previous day can be restored by the plotter as it is. Also, reprinting of materials prepared in advance can save time with this plotter device.

Since the writing sheet portion of the electronic blackboard can be rotated, its orientation can be detected, and the paper size can be specified, the digital image information can be stored or copied.
The size and direction can be stored as digital information, and the need to re-edit this digital image information can be saved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a functional configuration according to a first embodiment.

FIG. 2 is a schematic diagram of an electronic blackboard according to the first embodiment.

FIG. 3 is an enlarged view of a part of the operation panel according to the first embodiment.

FIG. 4 is a block diagram illustrating a configuration of a second embodiment.

FIG. 5 is a block diagram illustrating a functional configuration according to a third embodiment;

FIG. 6 is a schematic diagram of an electronic blackboard according to a fourth embodiment.

FIG. 7 is a block diagram illustrating a functional configuration according to a fourth embodiment.

FIG. 8 is a schematic view of an electronic blackboard according to a fifth embodiment.

FIG. 9 is an enlarged view of a part of an operation panel according to a fifth embodiment.

FIG. 10 is a block diagram illustrating a basic configuration of a normal electronic blackboard device.

FIG. 11 is a schematic diagram schematically illustrating driving of a writing sheet of a normal electronic blackboard device.

FIG. 12 is a schematic diagram schematically illustrating driving of a writing sheet of a normal electronic blackboard device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part 2 Operation panel 3 I / F part 4 Transmission / reception apparatus 11 Drive part 12 Writing sheet 13 Image reading part 14 A / D conversion for document information 21 Microphone 22 Amplifier 23 A / D conversion for voice information 24 Voice compression circuit 31 Primary Storage area (RAM) 32 Thermal paper recording section 33 Removable recording / storage area 34 Personal computer (PC) 35 Digital copier or laser printer 40 Plotter 41 CNC controller 42 Plotter drive 43 Writing sheet writing section (water-based pen, cloth, etc.) )

Claims (10)

[Claims] 1. A writing sheet capable of drawing character information such as characters and figures with an aqueous pen and erasing the writing information using cloth or the like, and a writing sheet drawn on the writing sheet. Image reading means for reading as analog image information, means for converting the read analog image information to digital image information, means for temporarily recording the digital image information, and connection interface means for transmitting and receiving the digital image information An electronic blackboard comprising: a microphone; and means for converting analog audio information obtained from the microphone into digital audio information and temporarily recording the digital audio information. 2. The electronic blackboard according to claim 1, wherein said digital image information and said digital audio information can be stored in a removable recording medium. 3. The electronic blackboard according to claim 1, wherein a semiconductor memory is used as said removable recording medium. 4. The electronic blackboard according to claim 1, wherein the removable recording medium is a CD.
-An electronic blackboard using R / RW (CD-Recordable / Rewritable). 5. The electronic blackboard according to claim 1, wherein the interface unit for transmitting the digital image information is a serial port or an interface for transmitting and receiving digital image information and digital audio information. An electronic blackboard, wherein any one of a local area network, infrared communication, and wireless communication can be selected as a unit. 6. The electronic blackboard according to claim 1, wherein the interface unit comprises:
An electronic blackboard that can be selected simply by inserting an expansion board. 7. The electronic blackboard according to claim 1, wherein the electronic blackboard can be controlled by a personal computer connected to the interface unit directly or via a local area network. Electronic blackboard. 8. The electronic blackboard according to claim 1, wherein the electronic blackboard is received from a personal computer connected to the interface unit or various terminal devices connected via a local area network. An electronic blackboard comprising drawing means for reproducing and drawing digital image information on the writing sheet. 9. The electronic blackboard according to claim 1, wherein a rotation mechanism is provided on the writing sheet portion. 10. The electronic blackboard according to claim 1, wherein a paper size can be specified when the digital image information is stored or copied. blackboard.