JP2002366343A - Switcher for electronic white board and electronic white board system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the burden for work and operation when switching and displaying pictures fed from a lot of computers on an electronic white board. SOLUTION: An electronic white board system is provided with an operation means for operation to select one of a lot of computers 3 and 4 and a switching means 1 which supplies a picture signal from the computer selected by the operation means to a picture projection means 5 for picture projection on an electronic white board 2 and is used for transmission and reception of a control signal, which should be transmitted and received between the electronic white board 2 and computers, between the electronic white board 2 and the computer selected by the operation means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a switcher and a system for switching and displaying images from a plurality of computers and image output devices other than computers on an electronic whiteboard.

[0002]

2. Description of the Related Art In schools and companies, a system using an electronic whiteboard has been widespread as a system for advancing a class or meeting while displaying an image.

[0003] An electronic whiteboard is a device that can display an image from a computer on a large screen and can operate the computer by touching the screen with a finger or the like.

FIG. 1 shows a conventional system using an electronic whiteboard. A serial port of the electronic whiteboard 101 and a serial port of a personal computer (hereinafter referred to as a personal computer) 102 are connected by a cable C21. Further, an RGB output terminal of the personal computer 102 and an RGB input terminal of the projector 103 for projecting an image on the screen 101a of the whiteboard 101 are provided.
They are connected by a cable C22.

A pressure-sensitive touch panel is used for the screen 101a. When the screen 101a is touched with a finger or the like, a control signal cont corresponding to the touched position is transmitted from the electronic whiteboard 101 to the personal computer 1.
02.

[0006] Software for executing processing according to a control signal cont from the electronic whiteboard 101 (software provided to a purchaser in connection with the purchase of the electronic whiteboard 101 as a product) is installed in the personal computer 102. ing. This allows
The personal computer 102 can be operated simply by touching the screen of the electronic whiteboard 101.

[0007] Characters and graphics can be written on the screen 101a with a finger or the like, and after such writing is performed, when the user touches a predetermined position (a position where an icon for storage is displayed) on the screen 101a, the written data is written. When a control signal cont for storing characters and graphics is sent from the electronic whiteboard 101 to the personal computer 102, the data of the characters and graphics is stored in the personal computer 102.

As described above, when the electronic whiteboard is used, not only the image from the personal computer can be displayed on the electronic whiteboard but also the personal computer can be operated while being near the electronic whiteboard. It can proceed smoothly.

[0009]

In a class or a meeting, however, it is desired to switch and display images from a plurality of personal computers, or to use an image output device other than the personal computers (for example, by photographing an object serving as a material with a CCD camera). In some cases, the user wants to display an image from a material presentation device that outputs the image or a player that reproduces an image recording medium such as a DVD.

[0010] However, in the electronic whiteboard system shown in FIG. 1, in order to switch and display images from a plurality of personal computers, the electronic whiteboard 101 and the projector 103 are connected up to that time when the images are switched. It is necessary to reconnect another personal computer to the electronic whiteboard 101 and the projector 103. Therefore, the work at the time of switching the video is complicated, and the work may take a long time to make it difficult to smoothly proceed with a class or a meeting.

On the other hand, since the video output device other than the personal computer only needs to be connected to the video input terminal of the projector 103, when switching between the video from the personal computer and the video from the video output device, such reconnection is not necessary. However, the operation of switching the image projected by the projector 103 between the image from the RGB input terminal and the image from the video input terminal cannot be performed by the electronic whiteboard 101, and the remote controller of the projector 103 or the main body of the projector 103 Must be performed on the operation panel. In addition, the operation of the video output device when displaying the video from the video output device cannot be performed on the electronic whiteboard 101, and must be performed using the remote controller of the video output device or the operation panel of the video output device body. Must. Therefore, the operation at the time of switching the video or displaying the video from the video output device is complicated.

[0012] In addition, in the case where images from a plurality of image output devices are switched and displayed, another image output device different from the image output device previously connected to the projector 103 at the time of image switching is used. Must be reconnected, so that the work of switching the video is complicated, and the work may take a long time to make it difficult to smoothly proceed with a class or a meeting.

As described above, in the conventional electronic whiteboard system, when images from a plurality of computers or video output devices other than the computers are switched and displayed on the electronic whiteboard, work and operation become complicated, There was an inconvenience that classes and meetings could not proceed smoothly.

In view of the above, the present invention is also applicable to a case where images from a plurality of computers or image output devices other than computers are switched and displayed on an electronic whiteboard.
The purpose of the present invention is to reduce the burden of work and operation and to make it possible to smoothly proceed with classes and meetings.

[0015]

In order to solve this problem, the applicant of the present invention has an operation means for performing an operation of selecting any one of a plurality of computers, and an image on an electronic whiteboard. An image signal from a computer selected using the operation means is supplied to the image projection means to be projected, and a control signal to be transmitted and received between the electronic whiteboard and the computer is transmitted to the electronic whiteboard and the operation means. And a switching means for transmitting and receiving to and from a computer selected by using the electronic whiteboard.

This switcher (the first switcher according to the present invention) is employed in an electronic whiteboard system, and an operation for selecting a computer whose image is to be displayed on the electronic whiteboard among a plurality of computers is performed by operating means. Then, the video signal from the selected computer is supplied to the video projecting means (for example, a projector) by the switching means, so that the video from the computer is displayed on the electronic whiteboard. Since the control signal is transmitted to and received from the selected computer, the computer can be operated while being near the electronic whiteboard (just by touching the screen of the electronic whiteboard).

Therefore, when switching and displaying images from a plurality of computers on the electronic whiteboard, it is sufficient to perform only the operation using the operating means when switching the images. There is no need to reconnect a computer other than the computer connected to the electronic whiteboard or projector to the electronic whiteboard or projector.

Thus, when switching and displaying images from a plurality of computers on the electronic whiteboard,
The burden of work is reduced, and lessons and meetings can proceed smoothly.

In the electronic whiteboard switcher, for example, the operating means causes the computer to execute a process of outputting a video signal of an icon for selecting one of a plurality of computers. It is preferred that there be.

Thus, the video signal of the icon for selecting any one of the plurality of computers is output from the computer, and the icon is displayed on the electronic whiteboard, so that the user was near the electronic whiteboard. The video can be switched by touching the display position of this icon while keeping the icon. Therefore, lessons and meetings can proceed more smoothly.

Alternatively, as another example, the operation means may be an operation button provided on a device including the switching means.

Next, the applicant assigns means for causing a computer to execute a process of outputting a video signal of an icon for selecting one of a computer and a video output device other than the computer, and an electronic whiteboard. There is proposed an electronic whiteboard switcher including, as a video projection unit for projecting a video, a control unit for selecting a video signal from a computer and a video output device selected by the icon.

When this switcher (the second switcher according to the present invention) is employed in an electronic whiteboard system,
Since the video signal of the icon for selecting one of the computer and the video output device is output from the computer, this icon is also displayed on the electronic whiteboard when the video from the computer is displayed on the electronic whiteboard Is done.

When an image from the computer is displayed on the electronic whiteboard and an image output device is selected with this icon, the control means selects an image signal from the image output device so that the image projection means (for example, a projector) is selected. Is controlled, the video from the video output device is displayed on the electronic whiteboard.

As described above, when the image displayed on the electronic whiteboard is switched to the image from the image output device, the operation of switching the image projected by the image projection means to the image from the image output device is performed on the electronic whiteboard ( This can be performed using an icon on the screen of the electronic whiteboard), and it is not necessary to perform the operation using the remote controller of the projector or the operation panel of the projector main body unlike the related art.

With this arrangement, when switching and displaying the image from the computer and the image from the image output device other than the computer on the electronic whiteboard, the burden of operation is reduced, and the class and the conference can be smoothly performed. Become.

In this electronic whiteboard switcher, a means for generating a video signal of an icon for selecting one of a computer and a video output device, and a video signal of the icon generated by the video output device. It is preferable that the apparatus further comprises means for synthesizing the video signal.

Thus, when the video from the video output device is displayed on the electronic whiteboard, an icon for selecting one of the computer and the video output device is displayed on the electronic whiteboard. When a computer is selected with this icon, the image projection means is controlled by the control means so as to select an image signal from the computer, so that the image from the computer is displayed on the electronic whiteboard.

As described above, even when the image displayed on the electronic whiteboard is switched to the image from the computer, the operation of switching the image projected by the image projection means to the image from the computer can be performed on the electronic whiteboard.

[0030] Thus, the operation load can be further reduced when the image from the computer and the image from the image output device other than the computer are switched and displayed on the electronic whiteboard.

In the electronic whiteboard switcher, a means for generating a video signal of an icon for operating the video output device, a means for combining the video signal of the icon with a video signal from the video output device, It is preferable that the display device further includes control means for controlling the video output device in response to the display position of the icon on the electronic whiteboard being touched.

When the display position of this icon is touched on the screen of the electronic whiteboard while displaying the video from the video output device, the video output device is operated because the control means controls the video output device. .

As described above, the operation of the video output device while displaying the video from the video output device can be performed by the electronic whiteboard. There is no need to use the operation panel of the main unit. As a result, the operation burden is further reduced.

Next, the applicant assigns operation means for performing an operation of selecting which one of a computer and a plurality of video output devices other than the computer to display an image on the electronic whiteboard. When one of the plurality of video output devices is selected using the operation means, the video from the selected video output device is transmitted to video projection means for projecting a video on an electronic whiteboard. An electronic whiteboard switcher comprising: a switching unit for supplying a signal; and a control unit for causing the video projection unit to select a video signal from a computer and a video output device selected using the operation unit. Suggest.

This switcher (third switcher according to the present invention) is employed in an electronic whiteboard system, and an operation for selecting a video output device of which video is desired to be displayed on the electronic whiteboard among a plurality of video output devices is operated. When the video signal is output from the video output device, the video signal from the video output device selected by the switching device is supplied to the video projection device, and the video projection device is controlled by the control device to select the video signal from the video output device. As a result, the video from the selected video output device is displayed on the electronic whiteboard.

Therefore, when switching and displaying images from a plurality of image output devices on the electronic whiteboard, it is sufficient to perform only the operation using the operation means when switching images, as in the conventional case. There is no need to reconnect the video output device different from the video output device previously connected to the projector to the projector.

Thus, when switching and displaying images from the computer and images from a plurality of image output devices other than the computer on the electronic whiteboard, the work load is reduced, and lessons and meetings can proceed smoothly. become able to.

In this electronic whiteboard switcher, as an example, the operating means performs a process of outputting a video signal of an icon for selecting one of a computer and a plurality of video output devices. It is preferable that the program is executed by a computer.

As a result, a video signal of an icon for selecting one of the computer and the plurality of video output devices is output from the computer, and the icon is displayed on the electronic whiteboard. The video can be switched by touching the display position of this icon while being near the whiteboard.

Alternatively, as another example, the operation means may be an operation button provided on a device including the switching means and the control means.

Further, in this electronic whiteboard switcher, means for creating a video signal of an icon for selecting one of a computer and a plurality of video output devices, and a video signal of the icon, It is preferable that the apparatus further comprises means for synthesizing a video signal from the video output device selected using the operation means.

Thus, even when an image from the video output device is displayed on the electronic whiteboard, an icon for selecting one of the computer and the plurality of video output devices is displayed on the electronic whiteboard. Therefore, when a computer is selected with this icon, the image projection means is controlled by the control means so as to select an image signal from the computer, and the image from the computer is displayed on the electronic whiteboard.

As described above, even when the image displayed on the electronic whiteboard is switched to the image from the computer, the operation of switching the image projected by the image projection means to the image from the computer can be performed on the electronic whiteboard.

Thus, the burden of operation can be further reduced when switching and displaying images from a computer and images from a plurality of image output devices other than the computer on the electronic whiteboard.

Also in this electronic whiteboard switcher, a means for creating a video signal of an icon for operating the video output device, and a video signal of the icon for converting the video signal selected by the operating means are used. According to the means for combining with the video signal from the output device and the display position of this icon on the electronic whiteboard is touched,
It is preferable to further include control means for controlling the video output device selected using the operation means.

As a result, the operation of the video output device while displaying the video from the video output device can also be performed by the electronic whiteboard, so that the operation burden is further reduced.

Next, the present applicant has disclosed an electronic whiteboard provided with operation buttons for selecting one of a computer and a video output device other than a computer on a portion other than the screen, An electronic whiteboard system is proposed in which video projection means for projecting a video on a board includes control means for selecting a video signal from the computer and the video output device selected from the operation buttons.

In this electronic whiteboard system, an operation button for selecting one of a computer and a video output device other than the computer is provided on a portion other than the screen of the electronic whiteboard itself. When a video output device is selected with this operation button when a video is displayed on the electronic whiteboard, the video projection unit (for example, a projector) is controlled by the control unit so as to select a video signal from the video output device. The video from the video output device is displayed on the electronic whiteboard. Further, when a computer is selected with this operation button when an image from the image output device is displayed on the electronic whiteboard, the image projection means is controlled by the control means to select an image signal from the computer. Then, the image from the computer is displayed again on the electronic whiteboard.

As described above, when the image to be displayed on the electronic whiteboard is switched between the image from the computer and the image from the image output device other than the computer, the image projected by the image projecting means is switched between the image from the computer and the image from the image. The operation of switching between images from the output device can be performed on the electronic whiteboard (using the operation buttons of the electronic whiteboard), and it is not necessary to perform the operation using the remote controller of the projector or the operation panel of the projector main body as in the past. Absent.

[0050] With this arrangement, when switching and displaying an image from a computer and an image from an image output device other than the computer on the electronic whiteboard, the burden of operation is reduced, and lessons and meetings can be smoothly performed. Become.

In the electronic whiteboard system, as an example, the operation buttons are used to select one of a plurality of computers and a video output device other than the computer. First switching means for supplying a video signal from the computer selected using the operation button to the video projection means for projecting a video, and a control signal to be transmitted and received between the electronic whiteboard and the computer, It is preferable to further include second switching means for transmitting and receiving between the electronic whiteboard and a computer selected using the operation button.

When the operation button is used to select a computer of the plurality of computers whose image is to be displayed on the electronic whiteboard, the image signal from the selected computer is projected by the switching means. Means (for example, a projector) so that an image from the computer is displayed on the electronic whiteboard, and a control signal is transmitted and received between the electronic whiteboard and the selected computer by the switching means. You can operate the computer while you are near.

Therefore, when images from a plurality of computers are switched and displayed on the electronic whiteboard, it is sufficient to perform the operation using the operation means when switching the images. There is no need to reconnect a computer other than the computer connected to the electronic whiteboard or projector to the electronic whiteboard or projector.

Accordingly, when switching and displaying images from a plurality of computers on the electronic whiteboard,
The burden of work is reduced, and lessons and meetings can proceed smoothly.

As an example, the second switching means includes means for assigning an identification code to each of a plurality of computers, and a control signal to be transmitted and received between the electronic whiteboard and the computer, which is selected by an operation button. Means for adding the identification code assigned to the assigned computer, and means for causing each of the plurality of computers to match the identification code assigned to the computer with the identification code added to the control signal. Is preferred.

Accordingly, even when the control signal output from the electronic whiteboard is input to all of the plurality of computers due to, for example, wireless connection between the electronic whiteboard and the plurality of computers, the assignment is performed. This control signal can be transmitted and received only between the computer having the same identification code and the identification code added to the control signal (that is, the computer selected by the operation button).

In this electronic whiteboard system, a keyboard for operating a computer, a controller for operating a video output device, and a computer are selected by operating buttons on the electronic whiteboard. A control signal corresponding to the operation of the keyboard is added to the information for identifying the computer selected by the operation button, and output. If the video output device is selected by the operation button, the control corresponding to the operation of the controller is performed. Further provided is an output processing means for adding information for identifying the video output device selected by the operation button to the signal and outputting the added information,
When information for identifying a computer is added to the control signal output from the output processing means,
The computer identified by the information is caused to execute processing in accordance with the control signal, and when information for identifying the video output device is added to the control signal output from the output processing means, the computer is identified by the information. It is preferable that the apparatus further includes a unit that controls the video output device according to the control signal.

Thus, not only can the computer be operated by touching the screen of the electronic whiteboard, but also the computer can be operated using a keyboard provided on the electronic whiteboard itself (for example, a number of operations that are difficult only by touching the screen). Input of characters, etc.). Also, when a video output device is selected with the operation button, the video output device can be operated using a controller provided on the electronic whiteboard itself. There is no need to perform this operation on the operation panel of the apparatus main body. Therefore, the operation burden is further reduced.

[0059]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 2 shows an example of an electronic whiteboard system employing the first switcher according to the present invention.
This electronic whiteboard system includes an AV selector 1 which is a single device, an electronic whiteboard 2, two personal computers 3, 4, a projector 5 for projecting an image on the electronic whiteboard 2, and a speaker 6 Are provided.

In this system, the AV selector 1
The software that causes a personal computer to execute the process of creating and outputting the video signal of the icon of FIG. 4 described later constitutes the switcher according to the present invention. Electronic whiteboard 2,
The projector 5 and the speaker 6 are existing, and the hardware configurations of the personal computers 3 and 4 are also existing.

On the surface of the housing of the AV selector 1, "PC
A selection key 1a labeled "1" and a selection key 1b labeled "PC2" are provided.

FIG. 3 shows a circuit configuration of the AV selector 1. A serial port 11 for PC1, a serial port 12 for PC2,
RGB input terminal 13 for PC and RGB input terminal 14 for PC2
, An audio input terminal 15 for PC1, an audio input terminal 16 for PC2, a serial port 17 for an electronic whiteboard, an RGB output terminal 18, and an audio output terminal 19.

In the AV selector 1, a CPU 20 and changeover switches 21 to 23 are provided.

The changeover switch 21 connects one of the serial port 11 for PC1 and the serial port 12 for PC2 to the serial port 17 for electronic whiteboard.
Connect to

The changeover switch 22 connects one of the RGB input terminal 13 for PC1 and the RGB input terminal 14 for PC2 to the RGB output terminal 18.

The switch 23 connects one of the audio input terminal 15 for PC1 and the audio input terminal 16 for PC2 to the audio output terminal 19.

The CPU 20 is connected to the serial port 17 for the electronic whiteboard, and is also connected to the selection keys 1a and 1b of FIG. 2 and control signal input terminals (not shown) of the changeover switches 21 to 23.

As shown in FIGS. 2 and 3, the serial port of the personal computer 3 and the serial port 11 for the PC1 of the AV selector 1 are connected by a cable C1.
The GB output terminal and the PC1 RGB input terminal 13 of the AV selector 1 are connected by a cable C2, and the audio output terminal of the personal computer 3 and the PC1 audio input terminal 15 of the AV selector 1 are connected by a cable C3.

The serial port of the personal computer 4 and the AV
The PC2 serial port 12 of the selector 1 is connected by a cable C4, and the RGB output terminal of the personal computer 4 and the PC2 RGB input terminal 14 of the AV selector 1 are connected by a cable C4.
5 and the audio output terminal of the PC 4 and the AV
The selector 1 is connected to the PC2 audio input terminal 16 by a cable C6.

The serial port of the electronic whiteboard 2 and the serial port 17 for the electronic whiteboard of the AV selector 1 are connected by a cable C7, and the RGB input terminal of the projector 5 and the RGB output terminal 18 of the AV selector 1 are connected by a cable. C8, the audio input terminal of the speaker 6 and the audio output terminal 1 of the AV selector 1.
9 is connected by a cable C9.

Therefore, the control signal cont is transmitted / received between one of the two personal computers 3 and 4 and the electronic whiteboard 2 via the changeover switch 21 of the AV selector 1 and the personal computers 3 and 4 are transmitted and received. And RGB signals from one of the personal computers 3 and 4 are supplied to the projector 5 via the changeover switch 22 of the AV selector 1, and the changeover switch of the AV selector 1 is supplied with the audio signal from one of the personal computers 3 and 4. It can be supplied to the speaker 6 via 23.

The personal computers 3 and 4 have software (software provided to the purchaser accompanying the purchase of the electronic whiteboard 2 as a product) for executing the processing in accordance with the control signal cont from the electronic whiteboard 2. Installed.

Further, as shown in FIG. 4, the personal computers 3 and 4 have an icon I1 labeled "PC1" in the corner of the screen.
In addition, software for executing a process of constantly outputting a video signal for displaying the icon I2 described as “PC2” (combining the video signal with another video signal when outputting other video signals) is installed.

Therefore, even when an image from either the personal computer 3 or the personal computer 4 is displayed on the screen 2a of the electronic whiteboard 2, the icons I1 and I2 are always displayed at the corners of the screen 2a. .

This software may be included in a part of the software provided to the purchaser in connection with the purchase of the electronic whiteboard 2, or separately from the purchase of the AV selector 1 as a product. May be provided to the purchaser. Also, the method of providing this software to the purchaser is as follows:
OM may be provided, or may be downloaded from a manufacturer's website.

FIG. 5 shows the processing executed by the CPU 20 of the AV selector 1. In this process, it is determined whether the display position of the icon I1 in FIG. 4 on the screen 2a of the electronic whiteboard 2 has been touched or the selection key 1a has been operated (step S1). The determination of whether the display position of the icon I2 in FIG. 4 has been touched or the selection key 1b has been operated (step S2) is repeated until the answer in any step is YES.

When the display position of the icon I1 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like,
The control signal co according to the display position of the icon I1
Since nt is output from the electronic whiteboard 2 and sent from the electronic whiteboard serial port 17 to the CPU 20, the answer is YES in step S1. Select key 1
Even if a is operated, the answer is yes in step S1.

If the answer is YES in step S1, the changeover switches 21, 22, and 23 are switched to the PC1 serial port 11, the PC1 RGB input terminal 13, and the PC1 audio input terminal 15, respectively (step S3). Then, the process returns to step S1.

On the other hand, when the display position of the icon I2 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, a control signal cont corresponding to the display position of the icon I2 is output from the electronic whiteboard 2 and the electronic whiteboard 2 Is sent from the serial port 17 for use to the CPU 20, so that the answer is yes in step S2. In addition, even if the selection key 1b is operated, the result of step S2 is YES.

If the answer is YES in step S2, the changeover switches 21, 22, and 23 are switched to the PC2 serial port 12, the PC2 RGB input terminal 14, and the PC2 audio input terminal 16, respectively (step S4). Then, the process returns to step S1.

In this electronic whiteboard system, the operation for switching and displaying the image from the personal computer 3 and the image from the personal computer 4 on the electronic whiteboard 2 is as follows.

For example, when an image from the personal computer 3 is to be displayed on the electronic whiteboard 2 first, the selection key 1a of the AV selector 1 is operated. Then, steps S1 and S1 of the process (FIG. 5) of the CPU 20 of the AV selector 1 are performed.
3, the control signal cont is transmitted / received between the personal computer 3 and the electronic whiteboard 2 via the AV selector 1, and the RGB signals from the personal computer 3 are supplied to the projector 5 via the AV selector 1; The audio signal is transmitted to the speaker 6 via the AV selector 1.
Supplied to

Therefore, the image from the personal computer 3 (FIG. 4)
Are displayed on the screen 2 a of the electronic whiteboard 2, sound from the personal computer 3 is generated from the speaker 6, and while the electronic whiteboard 2 is located near the electronic whiteboard 2 (the image of the electronic whiteboard 2). The personal computer 3 can be operated (just by touching the screen).

Subsequently, when it is desired to switch the image to be displayed on the electronic whiteboard 2 to an image from the personal computer 4, the display position of the icon I2 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, or
The selection key 1b of the selector 1 is operated.

Then, at steps S2 and S4 of the processing of the CPU 20 of the AV selector 1, the control signal cont is transmitted and received between the personal computer 4 and the electronic whiteboard 2 via the AV selector 1, and the R
The GB signal is supplied to the projector 5 via the AV selector 1, and the audio signal from the personal computer 4 is supplied to the speaker 6 via the AV selector 1.

Therefore, an image from the personal computer 4 is displayed on the screen 2 a of the electronic whiteboard 2, a sound from the personal computer 4 is generated from the speaker 6, and the sound is output from the electronic whiteboard 2 (the electronic whiteboard 2). PC 4 can be operated (just by touching the screen).

Subsequently, when it is desired to switch the image displayed on the electronic whiteboard 2 to the image from the personal computer 3 again, the display position of the icon I1 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, or A
The selection key 1a of the V selector 1 is operated.

Then, step S1 of the process of the CPU 20 is executed.
By S3 and S3, the image from the personal computer 3 is displayed again on the screen 2a of the electronic whiteboard.
From the speaker 6, and the user can operate the personal computer 3 while staying near the electronic whiteboard 2.

As described above, by touching the display positions of the icons I1 and I2 while being near the electronic whiteboard 2, it is possible to easily and quickly switch images between the personal computer 3 and the personal computer 4. Therefore, classes and conferences can proceed smoothly.

The selection keys 1a, 1 of the AV selector 1
The video can also be switched by operating b. Therefore, for example, the electronic whiteboard 2
AV when PC and PCs 3 and 4 are set apart
If the selector 1 is installed near the personal computers 3 and 4, it is possible to easily and quickly switch images even near the personal computers 3 and 4.

The following methods (1) to (4) are conceivable for using the electronic whiteboard system in school lessons.

(1) The personal computer 3 is used for teachers, and the personal computer 4 is used for students. Specifically, the following (a) to (d) are performed. (A) For a certain question, the teacher creates and saves a model answer on the personal computer 3, and a student creates and saves an answer on the personal computer 4. Students' answers from PC 4 to electronic whiteboard 2
And the teacher corrects the answer and switches to the video from the personal computer 3 as needed to display the model answer on the electronic whiteboard 2.

(B) The teacher displays a video for teaching material on the electronic whiteboard 2 from the personal computer 3 and causes the student to create a commentary on the video on the personal computer 4. And
By switching to the image from the personal computer 4, the commentary or the like is displayed on the electronic whiteboard 2.

(C) The teacher displays an e-mail received from the outside on the personal computer 3 on the electronic whiteboard 2, and causes the student to create an e-mail in reply to the e-mail on the personal computer 4. Then, by switching to the image from the personal computer 4, the reply e-mail is displayed on the electronic whiteboard 2, and the teacher instructs how to write the reply.

(D) E-mail is transmitted and received between the personal computer 3 and the personal computer 4, and during this time, the image from the personal computer 3 and the image from the personal computer 4 are alternately switched, so that the electronic mail of the personal computer on the transmitting side is transmitted. The screen by the mail software and the screen by the e-mail software of the personal computer on the receiving side are alternately displayed on the electronic whiteboard 2 so that the student can understand the process of transmitting and receiving the e-mail.

(2) Both the personal computers 3 and 4 are for students.
Specifically, two students (or two students)
The students of the group) prepare and save the answers on the personal computers 3 and 4, respectively. Then, the answer of one student is
Then, after displaying the results on the electronic whiteboard 2 and criticizing them all, the display is switched to the image from the personal computer 4 to display the answer of the other student on the electronic whiteboard 2 for comparison.

(3) Both the personal computers 3 and 4 are for teacher use.
Specifically, the video for teaching materials from the personal computer 3 and the personal computer 4
Is alternately switched to another video for teaching material and displayed on the electronic whiteboard 2.

(4) The personal computer 4 is used for backup. That is, the teaching material image is normally displayed on the electronic whiteboard 2 from the personal computer 3, and when the personal computer 3 breaks down, the image is switched to the image from the personal computer 4, and the same teaching material image is displayed on the electronic whiteboard 2 from the personal computer 4. indicate.

Even when the electronic whiteboard system is used in the methods (1) to (4), the video can be switched easily and quickly as described above, so that the lesson proceeds smoothly. can do.

Next, FIG. 6 shows an example of an electronic whiteboard system employing the first, second and third switchers according to the present invention. Are given. This electronic whiteboard system includes an AV selector 7 which is a single device.
, An electronic whiteboard 2, personal computers 3, 4, a projector 5, a speaker 6, and a material presentation device 8 and a DVD player 9, which are video output devices other than the personal computer.

In this system, the AV selector 7
The software that causes a personal computer to execute the process of creating and outputting the video signal of the icon of FIG. 8 described below constitutes the switcher according to the present invention. Electronic whiteboard 2,
Projector 5, speaker 6, document presentation device 8, and DV
The D player 9 is an existing one (the material presentation device 8 is a device for presenting an object M as a material placed on the
b and outputs the video signal)
The hardware configurations of the personal computers 3 and 4 are also existing ones.

On the housing surface of the AV selector 7, "PC
A selection key 7a labeled "1", a selection key 7b labeled "PC2", and a selection key 7 labeled "V1".
c, a selection key 7d described as "V2", and a pattern on / off key 7e not shown in the figure but described as "Pattern ON / OFF".

FIG. 7 shows the circuit configuration of the AV selector 7, and the same reference numerals are given to parts common to FIG. On the surface of the housing of the AV selector 7, in addition to the same serial ports and terminals 11 to 19 as in FIG. 3, an audio input terminal 31 for V1, an audio input terminal 32 for V2,
1 serial port 33 and V2 serial port 34
, A V1 video input terminal 35, a V2 video input terminal 36, a projector serial port 37, and a video output terminal 38.

The AV selector 7 has a CPU 39 and a changeover switch 4 instead of the changeover switches 21 and 23 shown in FIG.
0, 41, changeover switches 42, 43, a mixer 44, and a pattern generator 45 are provided.

The changeover switch 40 connects one of the serial port 11 for PC1, the serial port 12 for PC2, and the CPU 39 to the serial port 17 for electronic whiteboard. The projector serial port 37 is connected to the CPU 39.

The changeover switch 41 is connected to the audio input terminal 15 for PC1, the audio input terminal 16 for PC2, and V1
One of the audio input terminal 31 for V2 and the audio input terminal 32 for V2
9

The changeover switch 42 connects one of the V1 serial port 33 and the V2 serial port 34 to the CPU 39.

The changeover switch 43 connects one of the V1 video input terminal 35 and the V2 video input terminal 36 to one input terminal of the mixer 44. Mixer 4
A pattern generator 45 is connected to the other input terminal of 4.
Are connected, and the output terminal of the mixer 44 is connected to the video output terminal 38.

The CPU 39 is connected to the electronic whiteboard serial port 17 and connected to the selection keys 7a to 7e, control signal input terminals (not shown) of the changeover switches 22, 40 to 43 and the pattern generator 45 in FIG. It is connected.

Electronic whiteboard 2, personal computers 3, 4,
The connection between the RGB input terminal of the projector 5, the speaker 6, and the AV selector 7 is the same as in the system of FIG.

As shown in FIGS. 6 and 7, the serial port of the presentation device 8 and the V1 serial port 33 of the AV selector 7 are connected by a cable C10, and the video output terminal of the presentation device 8 and the AV selector 7 are connected. The video input terminal 35 for V1 is connected by a cable C11.
(Because there is no audio output terminal in the material presentation device 8, the material presentation device 8 is not connected to the V1 audio input terminal 31 of the AV selector 7.)

The serial port of the DVD player 9 and the V2 serial port 34 of the AV selector 7 are connected by a cable C12, and the video output terminal of the DVD player 9 and the V2 video input terminal 36 of the AV selector 7 are connected by a cable. The audio output terminal of the DVD player 9 and the V2 audio input terminal 32 of the AV selector 7 are connected by a cable C14.

The serial port of the projector 5 and the projector serial port 37 of the AV selector 7 are connected by a cable C15, and the video input terminal of the projector 5 and the video output terminal 38 of the AV selector 7 are connected by a cable C16. ing.

Therefore, the control signal cont is transmitted and received between one of the two personal computers 3 and 4 and the electronic whiteboard 2 via the changeover switch 40 of the AV selector 7, , DVD
Any one of the players 9 and C of the AV selector 7
The control signal cont (control signal for operating the material presentation device 8 and the DVD player 9) is transmitted to and received from the PU 39 via the changeover switch 42, and the CPU 39 of the AV selector 7 transmits the control signal RGB / Transmitting Vcont (a control signal for selecting one of the RGB signal input to the RGB input terminal and the video signal input to the video input terminal and projecting an image);
4 is supplied to the projector 5 via the changeover switch 22 of the AV selector 7 and the video signal from one of the material presenting device 8 and the DVD player 9 is converted to an AV signal. The projector 5 via the changeover switch 43 of the selector 7 and the mixer 44
And the PCs 3, 4 and DVD player 9
Can be supplied to the speaker 6 via the changeover switch 41 of the AV selector 7.

Software for executing processing in accordance with the control signal cont from the electronic whiteboard 2 is installed in the personal computers 3 and 4.

Further, as shown in FIG. 8, the personal computers 3 and 4 have an icon I1 labeled "PC1" at the corner of the screen.
1, Icon I12 labeled "PC2", "V1"
Software that executes a process of constantly outputting an RGB signal for displaying the icon I13 described as “I2” and the icon I14 described as “V2” (when outputting another RGB signal, combining and outputting the RGB signal). Installed.

Therefore, even when the video from either the personal computer 3 or the personal computer 4 is displayed on the screen 2a of the electronic whiteboard 2, the icons I11 to I14 are always displayed at the corners of the screen 2. .

FIG. 9 shows the processing executed by the CPU 39 of the AV selector 7. In this process, it is determined whether the display position of the icon I11 in FIG. 8 on the screen 2a of the electronic whiteboard 2 has been touched or the selection key 7a has been operated (step S11).
It is determined whether the display position of the icon I12 in FIG. 8 has been touched or the selection key 7b has been operated on the screen 2a (Step S12), and the display position of the icon I13 in FIG. Is touched or the selection key 7c is operated (step S13), and whether the display position of the icon I14 in FIG. 8 on the screen 2a of the electronic whiteboard 2 is touched or the selection key 7d is operated is determined. The determination (step S14) is repeated until the answer in any step is yes.

When the display position of the icon I11 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, a control signal cont corresponding to the display position of the icon I11 is output from the electronic whiteboard 2 and the serial signal for the electronic whiteboard 2 is output. Since the data is sent from the port 17 to the CPU 39, the determination in step S11 is YES. In addition, even if the selection key 7a is operated, the result of step S11 is YES.

If the answer is YES in step S11, the changeover switches 40, 22, 41 are respectively switched to the PC1 serial port 11, the PC1 RGB input terminal 13, and the PC1 audio input terminal 15 (step S15).
A control signal RGB / Vcont for causing the projector 5 to select an RGB signal is output to the projector serial port 37 (step S16). Then, the process returns to step S11.

On the other hand, when the display position of the icon I12 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, a control signal cont corresponding to the display position of the icon I12 is output from the electronic whiteboard 2 and Serial port 17 to CPU 39
, So the answer is yes in step S12. In addition, even if the selection key 7b is operated, the answer is YES in step S12.

If the answer is YES in step S12, the changeover switches 40, 22, and 41 are switched to the PC2 serial port 12, the PC2 RGB input terminal 14, and the PC2 audio input terminal 16 (step S17).
A control signal RGB / Vcont that causes the projector 5 to select an RGB signal is output to the projector serial port 37 (step S18). Then, the process returns to step S11.

On the other hand, when the display position of the icon I13 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, a control signal cont corresponding to the display position of the icon I13 is output from the electronic whiteboard 2 and Serial port 17 to CPU 39
, So the answer is yes in step S13. In addition, even if the selection key 7c is operated, the answer is YES in step S13.

If the answer is YES in step S13, the changeover switch 40 is changed over to the CPU 39 and the changeover switches 41, 42, 43 are changed over to the V1 audio input terminal 31, the V1 serial port 33, and the V1 video input terminal 35, respectively. (Step S19), a control signal R for causing the projector 5 to select a video signal
GB / Vcont to projector serial port 37
(Step S20).

Subsequently, it is determined whether or not the pattern on / off key 7e is on (step S21).
If it is turned on, as shown in FIG.
, An icon I12 written as "PC2", an icon I12 written as "V1"
3, Icon I14 labeled "V2", "REW"
Icon I15 described as "ITP", icon I16 described as "STP", and icon I1 described as "PLY"
7 and the pattern generator 45 are instructed to create a video signal for displaying the icon I18 described as "FF" at the corner of the screen (the icons I11 to I14 are in the same position as in FIG. 8) (step S22).

Subsequently, when the display positions of the icons I15 to I18 on the screen 2a of the electronic whiteboard 2 are touched with a finger or the like, a control signal cont corresponding to those display positions is output from the electronic whiteboard 2 and the electronic whiteboard 2 outputs them. CP from whiteboard serial port 17
When sent to U39, the control signal cont for operating the video output device (the material presentation device 8 or the DVD player 9) is output to the changeover switch 42 accordingly (step S23). Then, the process returns to step S11.

If the pattern on / off key 7e has not been turned on in step S21, the process returns to step S11.

On the other hand, when the display position of the icon I14 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, a control signal cont corresponding to the display position of the icon I14 is output from the electronic whiteboard 2 and Serial port 17 to CPU 39
, So the answer is yes in step S14. In addition, even if the selection key 7d is operated, the answer is YES in step S14.

If the answer is YES in step S14, the changeover switch 40 is switched to the CPU 39 side, and the changeover switches 41, 42, 43 are respectively switched to the V2 audio input terminal 32, the V2 serial port 34, and the V2 video input terminal 36 side. (Step S24), the process proceeds to step S20, and steps S20 to S23 are executed.

It should be noted that the control signal cont for operating the video output device output in step S23 must have different contents depending on whether the video output device is the material presentation device 8 or the DVD player 9.

Therefore, for example, the setting information for dedicating the V1 serial ports and terminals 31, 33 and 35 exclusively for the data presentation device 8 and the V2 serial ports and terminals 32, 34 and 36 exclusively for the DVD player 9 is described below. CPU3
9 is stored.

When the display position of the icon I13 is touched or the selection key 7c is operated, it is recognized that the display device is the document presentation device 8, and in response to the touch of the display position of the icon I17, the CCD camera is read. The power of the CCD camera 8b may be turned on, or the power of the CCD camera 8b may be turned off in response to the display position of the icon I16 being touched.

Further, when the display position of the icon I14 is touched or the selection key 7d is operated, the DV
Recognizing that the player is the D player 9, the DVD is reproduced at a normal speed in response to the touch of the display position of the icon I 17, and the fast forward is performed in response to the touch of the display position of the icon I 18. Or causes the player to perform fast rewind when the display position of the icon I15 is touched, or causes the DV to return when the display position of the icon I16 is touched.
The reproduction of D may be stopped.

In this electronic whiteboard system, the operation for switching and displaying the image from the personal computer 3 and the image from the personal computer 4 on the electronic whiteboard 2 is as follows.

For example, when an image from the personal computer 3 is to be displayed on the electronic whiteboard 2 first, the selection key 7a of the AV selector 7 is operated. Then, the CPU 39
By the steps S11, S15 and S16 of the process (FIG. 9), the AV
The control signal cont is transmitted and received via the selector 7, the RGB signal from the personal computer 3 is supplied to the projector 5, the audio signal from the personal computer 3 is supplied to the speaker 6, and the RGB signal is selected by the projector 5.

Accordingly, the image from the personal computer 3 (FIG. 8)
Are displayed on the screen 2a of the electronic whiteboard 2, the sound from the personal computer 3 is generated from the speaker 6, and the personal computer 3 is operated while being near the electronic whiteboard 2. Can be.

Subsequently, when the video to be displayed on the electronic whiteboard 2 is to be switched to the video from the personal computer 4, the display position of the icon I12 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, or A
The selection key 7b of the V selector 7 is operated.

Then, step S1 of the processing of the CPU 39 is executed.
2, S17 and S18, the control signal cont is transmitted and received between the personal computer 4 and the electronic whiteboard 2 via the AV selector 7, and the RGB from the personal computer 4 is transmitted.
The signal is supplied to the projector 5 via the AV selector 7, and the audio signal from the personal computer 4 is supplied to the AV selector 7.
Is supplied to the speaker 6 via the
The B signal is selected.

Accordingly, the image from the personal computer 4 (FIG. 8)
Are displayed on the screen 2a of the electronic whiteboard, sound from the personal computer 4 is generated from the speaker 6, and the personal computer 4 can be operated while being near the electronic whiteboard 2. it can.

Subsequently, when it is desired to switch the image displayed on the electronic whiteboard 2 to the image from the personal computer 3 again, touch the display position of the icon I11 on the screen 2a of the electronic whiteboard 2 with a finger or the like, or The selection key 7a of the AV selector 7 is operated.

Then, step S1 of the processing of the CPU 39 is executed.
1, S15 and S16, the image from the personal computer 3 is displayed again on the screen 2a of the electronic whiteboard, the sound from the personal computer 3 is generated from the speaker 6, and the personal computer 3 is kept close to the electronic whiteboard 2.
Can be operated.

Further, in this electronic whiteboard system, an image from the personal computer 3 or 4 and an image from the material presentation device 8 or the DVD player 9 are transferred to the electronic whiteboard 2.
The operation at the time of switching and displaying is as follows.

For example, when the video from the personal computer 3 or 4 is displayed on the electronic whiteboard 2 and the user wants to switch the video to be displayed on the electronic whiteboard 2 to the video from the material presentation device 8, The user touches the display position of the icon I13 on the second screen 2a with a finger or the like, or operates the selection key 7c of the AV selector 7.

Then, step S1 of the process of the CPU 39 is executed.
3, S19 and S20 make it possible to transmit and receive a control signal cont (control signal for operating the material presentation device 8) between the CPU 39 and the material presentation device 8, and to transmit a video signal from the material presentation device 8 to the AV. The video signal is supplied to the projector 5 via the selector 7 and the video signal is selected by the projector 5.

When the pattern on / off key 7e of the AV selector 7 is turned on, the video signal from the data presentation device 8 and the icons I11 to I18 ( The video signal of FIG.
Therefore, the icons I11 to I18 are also displayed on the screen 2a of the electronic whiteboard 2.

When the display position of the icons I15 to I18 on the screen 2a of the electronic whiteboard 2 is touched by a finger or the like, the control signal cont for operating the material presentation device 8 is changed by the processing of the CPU 39 in step S23. It is sent to the presentation device 8.

Therefore, the image (and the icons I11 to I18) from the material presenting device 8 is displayed on the screen 2a of the electronic whiteboard 2, and the user operates the material presenting device 8 while being near the electronic whiteboard 2. Can be.

Subsequently, when it is desired to switch the image displayed on the electronic whiteboard 2 to the image from the DVD player 9, the display position of the icon I14 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, or The selection key 7d of the AV selector 7 is operated.

Then, step S1 of the process of the CPU 39 is executed.
4, S24 and S20 enable transmission and reception of a control signal cont (control signal for operating the DVD player 9) between the CPU 39 and the DVD player 9, and the video signal from the DVD player 9
The video signal is supplied to the projector 5 via the selector 7, the video signal is selected by the projector 5, and the audio signal from the DVD player 9 is supplied to the speaker 6 via the AV selector 7.

When the pattern on / off key 7e of the AV selector 7 is turned on, the icons I11 to I1 are set in steps S21 and S22 of the processing of the CPU 39.
8 is also displayed on the screen 2 a of the electronic whiteboard 2.

When the display position of the icons I15 to I18 on the screen 2a of the electronic whiteboard 2 is touched with a finger or the like, the control signal cont for operating the DVD player 9 is presented by the CPU 39 in step S23 of the processing of the CPU 39. It is sent to the device 8.

Therefore, the video (and the icons I11 to I18) from the DVD player 9 is displayed on the screen 2a of the electronic whiteboard 2, the sound from the DVD player 9 is generated from the speaker 6, and the electronic whiteboard 2 The DVD player 9 can be operated while being near.

Subsequently, when it is desired to switch the image displayed on the electronic whiteboard 2 to an image from the personal computer 3 or 4 again, the display position of the icons I11 and I12 on the screen 2a of the electronic whiteboard 2 is changed with a finger or the like. Touch or operate the selection keys 7a and 7b of the AV selector 7.

Then, step S1 of the process of the CPU 39 is executed.
1, S15 and S16 and steps S12, S17 and S
18, the image from the personal computer 3 or 4 is displayed on the screen 2 a of the electronic whiteboard 2 again, the sound from the personal computer 3 or 4 is generated from the speaker 6, and the personal computer 3 is kept close to the electronic whiteboard 2. 3 and 4 can be operated.

As described above, by touching the display positions of the icons I11 to I14 while being close to the electronic whiteboard 2, the image can be easily and quickly transmitted between the personal computer 3, the personal computer 4, the document presenting device 8, and the DVD player 9. Can be switched. Therefore, classes and conferences can proceed smoothly.

The selection keys 7a to 7 of the AV selector 7
The video can also be switched by operating d. Therefore, for example, the electronic whiteboard 2
And personal computers 3 and 4, document presentation device 8 and DVD player 9
If the AV selector 7 is installed near the personal computers 3 and 4, the material presenting device 8 and the DVD player 9 when the personal computer 3, 4 and the material presenting device 8 and the DVD player 9 Switching of images can be performed easily and quickly even near 9.

Also, the material presentation device 8 and the DVD player 9
Presentation device 8 and DV when displaying video from
The operation of the D player 9 can also be performed by touching the display positions of the icons I15 to I18 while being near the electronic whiteboard 2, so that the burden of the operation is further reduced.

In the above example, the connection between the personal computer, the document presentation device, the DVD player, the electronic whiteboard, the projector, the speaker, and the AV selector is made by a cable, but this connection may be made wirelessly.

In the above example, the present invention is applied to a system using an electronic whiteboard on which an image from a projector is projected. However, the present invention is also applied to a system using an electronic whiteboard with a built-in projector. May be adopted.

In the above example, the image displayed on the electronic whiteboard is switched between two personal computers or between two personal computers and two video output devices other than the personal computer. Selectors 1 and 7 for
Is composed. However, the present invention is not limited to this, and an AV selector for switching the image displayed on the electronic whiteboard between three or more personal computers and between the personal computer and three or more video output devices other than the personal computer. May be configured.

In the above example, the AV selector is configured as a single device, but an electronic whiteboard having a built-in AV selector function may be configured.

Next, FIG. 11 shows an example of the configuration of an electronic whiteboard system according to the present invention, and the same reference numerals are given to parts common to the system of FIG. The electronic whiteboard system includes an electronic whiteboard 51, an AV selector 52 as a single device, personal computers 3, 4, a projector 5, a speaker 6, and a material presentation device 8 as an image output device other than the personal computer. And DV
A D player 9 is provided.

In this system, the electronic whiteboard 51, the AV selector 52, and software for causing a personal computer to execute an ID collation process described below constitute the present invention. The projector 5, the speaker 6, the document presentation device 8 and the DVD player 9 are existing, and the hardware configurations of the personal computers 3 and 4 are also existing.

On the side of the screen surface of the electronic whiteboard 51 on the side of the screen 51a, an operation switch SW1 described as "PC1", an operation switch SW2 described as "PC2", and "V1" are displayed. And an operation switch SW described as “V2”.
4 (“PC1”, “PC1” in the figure).
2 "," V1 "and" V2 "are omitted).

On the lower surface of the screen 51a on the surface of the housing of the electronic whiteboard 51, mounting tables 51b and 5 on which an operation board such as a keyboard can be mounted.
1c is provided.

A keyboard 53 for operating a personal computer is mounted on the mounting table 51b while being connected to the electronic whiteboard 51 by a cable C17. The keyboard 53 can be used while being mounted on the mounting table 51b, and can be pulled out from the mounting table 51b within a range of the cable C17 (for example, placed on a desk (not shown) installed near the electronic whiteboard 51). Can also be.

An AV controller 54 is provided on the mounting table 51c.
Are connected to the electronic whiteboard 51 via the cable C18. The AV controller 54
An operation key provided with an operation key for turning on / off the power of the CCD camera 8b of the material presentation device 8 and an operation key for causing the DVD player 9 to perform normal speed reproduction, fast forward, fast rewind, and stop reproduction. It is a board. The AV controller 54 can be used while being mounted on the mounting table 51c, and can be used by being pulled out from the mounting table 51c within a range where the cable C18 can reach.

FIG. 12 shows a portion related to the present invention in the circuit configuration of the electronic whiteboard 51. The CPU 61 controls each part of the electronic whiteboard 51.
When the screen 51a is touched with a finger or the like, information indicating the touched position is sent from the screen 51a to the CPU 61, and a control signal cont corresponding to the touched position is output from the CPU 61 and transmitted to the serial interface 62. Sent.

The operation switches SW1 to SW4, the keyboard 53, and the AV controller 54 shown in FIG.
1 connected.

FIG. 13 shows a part related to the present invention in the processing executed by the CPU 61. In this process, it is determined whether the operation switch SW1 has been operated (step S31).
And whether the operation switch SW2 has been operated (step S32), whether the operation switch SW3 has been operated (step S33), and whether the operation switch SW4 has been operated (step S34). Repeat until it is yes.

If the answer is YES in step S31, the control signal c based on the position information from the screen 51a is output.
Ont is added with information of identification code (ID) = “1” and output (step S35). Further, based on the operation of a key on the keyboard 53, information of ID = "1" is added to a control signal cont indicating the key operation and output (step S36). Then, the process returns to step S31.

On the other hand, if the answer is yes in step S32,
Information of ID = "2" is added to the control signal cont based on the position information from the screen 51a and output (step S37). Further, based on the operation of a key on the keyboard 53, information of ID = “2” is added to a control signal cont indicating the key operation and output (step S38). Then, step S31
Return to

On the other hand, if “yes” in the step S33,
When a key on the AV controller 54 is operated, a control signal cont indicating the key operation is given as
Information with ID = “3” is added and output (step S3)
9). Then, the process returns to step S31.

On the other hand, if "yes" in step S34,
When a key on the AV controller 54 is operated, a control signal cont indicating the key operation is given as
Information with ID = “4” is added and output (step S4)
0). Then, the process returns to step S31.

As shown in FIG. 11, a selection key 52a labeled "PC1" is provided on the surface of the housing of the AV selector 52.
, A selection key 52b written as “PC2”, and “V
A selection key 52c labeled "1" and a selection key 52d labeled "V2" are provided.

FIG. 14 shows a circuit configuration of the AV selector 52, and portions common to FIG. 7 are denoted by the same reference numerals. 7, the serial port 11 for PC1, the serial port 12 for PC2, the RGB input terminal 13 for PC1,
RGB input terminal 14, audio input terminal 15 for PC1, audio input terminal 16 for PC2, serial port 17 for electronic whiteboard, and RGB output terminal 1.
8, audio output terminal 19, V1 audio input terminal 31, V2 audio input terminal 32, V1
Serial port 33 and V2 serial port 34
, A V1 video input terminal 35, a V2 video input terminal 36, a projector serial port 37, and a video output terminal 38.

The AV selector 52 includes a CPU 71,
The changeover switches 22, 41, and 43 of FIG. 7 are provided.

The changeover switch 22 is, as in FIG.
1 RGB input terminal 13 and PC2 RGB input terminal 14
Is connected to the RGB output terminal 18.

The changeover switch 41 is, as in FIG.
One of the audio input terminal 15 for 1, the audio input terminal 16 for PC2, the audio input terminal 31 for V1 and the audio input terminal 32 for V2 is connected to the audio output terminal 19.

The changeover switch 43 connects one of the V1 video input terminal 35 and the V2 video input terminal 36 to the video output terminal 38.

The CPU 71 is a serial port 1 for PC1.
1, the serial port 12 for PC2, the serial port 33 for V1, the serial port 34 for V2, and the serial port 17 for electronic whiteboard.
1 selection keys 52a to 52e and changeover switches 22, 4
1, 43 are connected to control signal input terminals (not shown).

As shown in FIGS. 11 and 14, the serial port of the personal computer 3 and the PC1 serial port 11 of the AV selector 52 are connected by a cable C1, and the RGB output terminal of the personal computer 3 and the PC1 RGB of the AV selector 52 are connected.
The B input terminal 13 is connected by a cable C2, and the audio output terminal of the personal computer 3 and the PC1 audio input terminal 15 of the AV selector 52 are connected by a cable C3.

The serial port of the personal computer 4 and the AV
The serial port 12 for PC2 of the selector 52 is connected by a cable C4, and the RGB output terminal of the personal computer 4 is connected to the AV terminal.
The PC2 RGB input terminal 14 of the selector 52 is connected by a cable C5, and the audio output terminal of the personal computer 4 and the PC2 audio input terminal 16 of the AV selector 52 are connected by a cable C6.

The serial port of the electronic whiteboard 51 (the serial port of the serial interface 62 in FIG. 12) and the serial port 17 for the electronic whiteboard of the AV selector 52 are connected by a cable C7. RG of AV selector 52
The B output terminal 18 is connected by a cable C8, and the audio input terminal of the speaker 6 and the audio output terminal 19 of the AV selector 52 are connected by a cable C9.

The serial port of the presentation device 8 and the V1 serial port 33 of the AV selector 52 are connected by a cable C10, and the video output terminal of the presentation device 8 and the V1 video input terminal 35 of the AV selector 52 are connected to each other. Are connected by a cable C11.

The serial port of the DVD player 9 and the V2 serial port 34 of the AV selector 52 are connected by a cable C12, and the video output terminal of the DVD player 9 and the V2 video input terminal 36 of the AV selector 52 are connected.
Are connected by a cable C13, and the audio output terminal of the DVD player 9 and the V2 audio input terminal 32 of the AV selector 52 are connected by a cable C14.

Also, the serial port of the projector 5 and the projector serial port 37 of the AV selector 52
Are connected by a cable C15, and the video input terminal of the projector 5 and the video output terminal 38 of the AV selector 52 are connected by a cable C16.

Therefore, the control signal cont output from the electronic whiteboard 51 is transmitted to the AV selector 5
2, a command corresponding to the control signal cont output from the electronic whiteboard 51 is sent from the CPU 71 to the data presentation device 8 or the DVD player 9, and the AV selector 7 Of the control signal RGB / Vcont (R input to the RGB input terminal)
A control signal for selecting one of the GB signal and the video signal input to the video input terminal to project an image, and transmitting an RGB signal from one of the personal computers 3 and 4. The video signal is supplied to the projector 5 via the changeover switch 22 of the AV selector 7 and the video signal from one of the material presentation device 8 and the DVD player 9 is supplied to the projector 5 via the changeover switch 43 of the AV selector 7. It is possible to supply the audio signal from one of the personal computers 3 and 4 and the DVD player 9 to the speaker 6 via the changeover switch 41 of the AV selector 7.

Software for executing processing in accordance with a control signal cont from the electronic whiteboard 51 is installed in the personal computers 3 and 4.

Further, in the personal computer 3, data of ID = “1” which is an identification code assigned to the personal computer 3 is installed, and this ID = “1” is added to the control signal cont input from the AV selector 52. Software that verifies the ID information and that permits execution of processing in accordance with the control signal cont only when the ID information matches the ID information is installed.

Also, in the personal computer 4, data of ID = “2”, which is an identification code assigned to the personal computer 4, is installed, and this ID = “2” is added to the control signal cont input from the AV selector 52. Software that verifies the ID information and that permits execution of processing in accordance with the control signal cont only when the ID information matches the ID information is installed.

The ID data and the software are included in a part of the software provided to the purchaser in connection with the purchase of the electronic whiteboard 51 and the AV selector 52. The method of providing the ID data and the software to the purchaser may be to provide a CD-ROM in which the ID data and the software are recorded, or to download the ID data and the software from the manufacturer's Web site. Is also good.

FIG. 15 shows the CPU 71 of the AV selector 52.
Shows the processing to be executed. In this process, the control signal cont input from the electronic whiteboard 51 has an ID
= Information of “1” is added (Step S
41) and ID =
It is determined whether the information “2” is added (Step S4)
2) and the control signal cont has ID = “3”.
(Step S43)
It is determined whether information of ID = “4” is added to the control signal cont (step S44).
It is determined whether or not the selection key 52a on the surface of the housing of the V selector 52 has been operated (step S45), whether or not the selection key 52b on the surface of the housing of the AV selector 52 has been operated (step S46). It is determined whether or not the front selection key 52c has been operated (step S47);
The determination as to whether the selection key 52d on the housing surface of the AV selector 52 has been operated (step S48) is repeated until the answer in any step is YES.

If the determination in step S41 is YES, the control signal cont with ID information input from the electronic whiteboard 51 is directly transmitted to the serial port 1 for PC1.
1 and output to the PC2 serial port 12 (step S49). Further, the changeover switches 22 and 41 are respectively switched to the RGB input terminal 13 for PC1 and the audio input terminal 15 for PC1 (step S50), and the control signal RGB for causing the projector 5 to select the RGB signal.
/ Vcont is output to the projector serial port 37 (step S51). Then, the process returns to step S41.

On the other hand, if the answer is yes in step S42,
The control signal cont with ID information input from the electronic whiteboard 51 is directly output to the serial port 11 for PC1 and the serial port 12 for PC2 (step S52). Further, the changeover switches 22 and 41 are switched to the RGB input terminal 14 for PC2 and the audio input terminal 16 for PC2, respectively (step S53).
Then, the process returns to step S41 via the above-described step S51.

On the other hand, if "yes" in step S43,
The content of the control signal cont input from the electronic whiteboard 51 is converted into a command for actually operating the material presentation device 8 (for example, the control signal cont
Is the content of C of the material presentation device 8 by the AV controller 54.
If it indicates that a key operation for turning on the power of the CD camera 8b has been performed, the command is converted into a command for turning on the power of the CCD camera 8b) (step S54), and the converted control signal cont is converted into a serial signal for V1. Output to the port 33 (step S55). Further, the changeover switches 41 and 43 are switched to the V1 audio input terminal 31 and the V1 video input terminal 35, respectively (step S56), and a control signal RGB / Vcont for causing the projector 5 to select a video signal is transmitted to the projector serial port 37. Output (Step S57). Then, the process returns to step S41.

On the other hand, if "yes" in step S44,
The content of the control signal cont input from the electronic whiteboard 51 is converted into a command for actually operating the DVD player 9 (for example, the control signal cont).
The content of t is stored in the DVD controller 9 by the AV controller 54.
If it indicates that a key operation for fast-forwarding has been performed, the command is converted into a command for causing the DVD player 9 to perform fast-forwarding) (step S58), and the converted control signal cont is sent to the V2 serial port 34. Output (Step S59). Also, changeover switches 41 and 4
3 are switched to the V2 audio input terminal 32 and the V2 video input terminal 36, respectively (step S60).
Then, the process returns to step S41 via the above-described step S57.

On the other hand, if the answer is yes in step S45,
The information of ID = "1" is added to the control signal cont (in this case, the ID information is not added) input from the electronic whiteboard 51 and output to the serial port 11 for PC1 and the serial port 12 for PC2. (Step S61). Then, the process returns to step S41 via steps S50 and S51 described above.

On the other hand, if "yes" in step S46,
Information of ID = “2” is added to the control signal cont (in this case, ID information is not added) input from the electronic whiteboard 51 and output to the serial port 11 for PC1 and the serial port 12 for PC2 ( Step S62). Then, the process returns to step S41 via steps S53 and S51 described above.

[0200] On the other hand, if "yes" in step S47,
After the above steps S56 and S57, step S41
Return to

On the other hand, if the answer is yes in step S48,
After the above-described steps S60 and S57, step S41
Return to

In this electronic whiteboard system, the operation for switching and displaying the image from the personal computer 3 and the image from the personal computer 4 on the electronic whiteboard 51 is as follows.

For example, to display an image from the personal computer 3 on the electronic whiteboard 51 first, the user operates the operation switch SW1 of the electronic whiteboard 51. Then, steps S31, S35 and S36 of the processing of the CPU 61 of the electronic whiteboard 51 (FIG. 13) and step S31 of the processing of the CPU 71 of the AV selector 52 (FIG. 15).
At 41 and S49, the information of ID = "1" is added to the control signal cont by touching the screen of the electronic whiteboard 51 or the key operation of the keyboard 53 and input to the personal computer 3 and the personal computer 4.

In the personal computers 3 and 4, the above-mentioned ID
Is performed, the process according to the control signal cont is executed only by the personal computer 3 (the control signal cont is transmitted and received only between the electronic whiteboard 51 and the personal computer 3).
An RGB signal and an audio signal are output only from the personal computer 3.

Then, in steps S50 and S51 of the processing of the CPU 71 of the AV selector 52, the RGB signals from the personal computer 3 are supplied to the projector 5, the audio signals from the personal computer 3 are supplied to the speaker 6, and the RGB signals are supplied to the projector 5. The signal is selected.

[0206] Therefore, an image from the personal computer 3 is displayed on the screen 51a of the electronic whiteboard 51, sound from the personal computer 3 is generated from the speaker 6, and the electronic whiteboard 51 remains close to the electronic whiteboard 51 (the electronic whiteboard 51). The user can operate the personal computer 3 by touching the screen or using the keyboard 53).

Subsequently, when the user wants to switch the image displayed on the electronic whiteboard 52 to an image from the personal computer 4, he operates the operation switch SW2 of the electronic whiteboard 51.

Then, the CPU of the electronic whiteboard 51
Steps S32, S37 and S38 of the process of Step 61
By the steps S42 and S52 of the processing of the CPU 71 of the V selector 52, the information of ID = “2” is added to the control signal cont by touching the screen of the electronic whiteboard 51 or the key operation of the keyboard 53, and the personal computer 3 Input to PC 4.

In the personal computers 3 and 4, the above-mentioned ID
Is performed, the process according to the control signal cont is executed only by the personal computer 4 (the control signal cont is transmitted and received only between the electronic whiteboard 51 and the personal computer 4).
The RGB signal and the audio signal are output only from the personal computer 4.

Then, in steps S53 and S51 of the processing of the CPU 71 of the AV selector 52, the RGB signals from the personal computer 4 are supplied to the projector 5, the audio signals from the personal computer 4 are supplied to the speaker 6, and the RGB signals are supplied to the projector 5. The signal is selected.

Therefore, the image from the personal computer 4 is displayed on the screen 51a of the electronic whiteboard 51, and the sound from the personal computer 4 is generated from the speaker 6 and is kept near the electronic whiteboard 51 (the electronic whiteboard 51). The personal computer 4 can be operated (by touching the screen or using the keyboard 53).

Subsequently, when it is desired to switch the image displayed on the electronic whiteboard 51 to the image from the personal computer 3 again, the operation switch SW1 of the electronic whiteboard 51 is used.
Operate.

Then, the CPU of the electronic whiteboard 51
61, steps S31, S35 and S36
Step S41 of the process of the CPU 71 of the V selector 52,
S49, S50 and S51 and IDs on PCs 3 and 4
The video from the personal computer 3 is displayed again on the screen 51a of the electronic whiteboard 51, the sound from the personal computer 3 is generated from the speaker 6, and the personal computer 3 is Be able to operate.

In this electronic whiteboard system, an image from the personal computer 3 or 4 and an image from the material presentation device 8 or the DVD player 9 are combined with the electronic whiteboard 5.
The operation for switching to 1 and displaying is as follows.

For example, when the video from the personal computer 4 is displayed on the electronic whiteboard 51 and the user wants to switch the video to be displayed on the electronic whiteboard 51 to the video from the presentation device 8, The operation switch SW3 is operated.

Then, the CPU of the electronic whiteboard 51
The command corresponding to the key operation of the AV controller 54 is sent to the material presentation device 8 by the steps S33 and S39 of the process 61 and the steps S43, S54 and S55 of the process of the CPU 71 of the AV selector 52. Therefore, for example, if the key operation is for turning on the power of the CCD camera 8b, the video signal of the material M is output from the material presentation device 8.

[0217] Then, in steps S56 and S57 of the process of the CPU 71 of the AV selector 52, the video signal from the presentation device 8 is supplied to the projector 5, and the projector 5 selects the video signal.

Therefore, the image from the material presentation device 8 is displayed on the screen 51a of the electronic whiteboard 51, and the video (A)
The document presentation device 8 can be operated (using the V controller 54).

Subsequently, when the video to be displayed on the electronic whiteboard 51 is to be switched to the video from the DVD player 9, the operation switch SW of the electronic whiteboard 51 is used.
Operate 4.

Then, the CPU of the electronic whiteboard 51
A command corresponding to the key operation of the AV controller 54 is sent to the DVD player 9 by steps S34 and S40 of the process of 61 and steps S44, S58 and S59 of the process of the CPU 71 of the AV selector 52. Therefore, for example, if the key operation is to cause the DVD player 9 to reproduce the DVD (reproduction at normal speed, fast forward, or fast reverse), the DVD player 9 outputs a video signal.

Then, the DVD player 9 is executed by S60 and S57 of the processing of the CPU 71 of the AV selector 52.
Is supplied to the projector 5 and this D
An audio signal from the VD player 9 is supplied to the speaker 6, and a video signal is selected by the projector 5.

Therefore, the image from the DVD player 9 is displayed on the screen 51a of the electronic whiteboard 51, and the sound from the DVD player 9 is generated from the speaker 6 and is kept near the electronic whiteboard 51 (AV controller). (Using 54) the DVD player 9 can be operated.

Subsequently, when it is desired to switch the image displayed on the electronic whiteboard 51 to an image from the personal computer 3, the operation switch SW1 of the electronic whiteboard 51 is operated.

Then, the CPU of the electronic whiteboard 51
61, steps S31, S35 and S36
Step S41 of the process of the CPU 71 of the V selector 52,
S49, S50 and S51 and IDs on PCs 3 and 4
The video from the personal computer 3 is again displayed on the screen 51a of the electronic whiteboard 51, the sound from the personal computer 3 is generated from the speaker 6, and the personal computer 3 is Be able to operate.

As described above, by operating the operation switches SW1 to SW4 while staying near the electronic whiteboard 51, the image can be easily and quickly transmitted between the personal computer 3, the personal computer 4, the data presentation device 8 and the DVD player 9. Switching can be performed. Therefore, classes and conferences can proceed smoothly.

Furthermore, not only the personal computer 3 and the personal computer 4 are operated by touching the screen of the electronic whiteboard 51, but also the personal computer 3 and the personal computer 4 are operated using the keyboard 53 provided on the electronic whiteboard 51 itself ( For example, it is possible to input a large number of characters that are difficult only by touching the screen. The operation switch S
When the material presentation device 8 or the DVD player 9 is selected by W3 or SW4, the material presentation device 8 or D is selected by using the AV controller 54 provided on the electronic whiteboard 51 itself.
The VD player 9 can be operated. Therefore,
The operation burden is further reduced.

Here, the case where the operation switches SW1 to SW4 of the electronic whiteboard 51 are operated has been described. However, even when the selection keys 52a to 52d of the AV selector 52 are operated, the processing of the CPU 71 of the AV selector 52 (FIG. ) Steps S45, S61, S50 and S5
1, steps S46, S62, S53 and S51,
Steps S47, S56 and S57, and step S4
8, S60 and S57 also make it possible to easily and quickly switch images between the personal computer 3, the personal computer 4, the material presenting device 8, and the DVD player 9.

For example, when the electronic whiteboard 51 and the personal computers 3 and 4, the material presenting device 8 and the DVD player 9 are set apart from each other, the AV selector 52 switches the personal computer 3 and 4, the material presenting device 8 and the DVD If it is installed near the player 9, it is possible to easily and quickly switch images even near the personal computers 3, 4, the document presentation device 8, and the DVD player 9.

However, the selection key 52a of the AV selector 52
To operate the PCs 3 and 4 using the keyboard 53, or to operate the AV controller 5
4 cannot be used to operate the material presentation device 8 and the DVD player 9.

In the examples shown in FIGS. 11 to 15, the control signal cont from the electronic whiteboard 51 is used.
When the information of ID = “1” or ID = “2” is added to the file, or when the selection key 52a or 52b of the AV selector 52 is operated, the personal computer 3,
4 is supplied with the control signal cont.

However, as another example, when the information of ID = 1 is added to the control signal cont from the electronic whiteboard 51 and when the selection key 52a of the AV selector 52 is operated, the AV selector The control signal cont is input only to the PC 3 from the PC 52 (the control signal cont is output only to the serial port 11 for the PC 1 in steps S49 and S61 in FIG. 15). When the information "2" is added and the selection key 52b of the AV selector 52 is operated, the control signal cont is input from the AV selector 52 to only the personal computer 4 (step S52 in FIG. 15).
Alternatively, in step S62, the control signal cont may be output only to the PC2 serial port 12).

This eliminates the need to install software for executing the above-described ID collation processing on the personal computers 3 and 4.

In the examples of FIGS. 11 to 15, the connection between the electronic whiteboard 51 and the AV selector 52 and the AV
Although the connection between the selector 52 and the personal computers 3 and 4 is made by a cable, this connection may be made wirelessly.

FIG. 16 shows an example of the configuration of an electronic whiteboard system in which this connection is made wirelessly, and portions common to those in the system of FIG. 11 are denoted by the same reference numerals. In this electronic whiteboard system, a wireless transmission / reception unit 51d is provided on the electronic whiteboard 51, and a control signal cont is output from the wireless transmission / reception unit 51d.

The AV selector 52 is provided with a wireless transmission / reception unit 52e, and the CPU 71 (FIG. 1) of the AV selector 52 is connected via the wireless transmission / reception unit 52e.
The control signal cont is input to 4).

The personal computers 3 and 4 are also provided with wireless transmitting and receiving units 3a and 4a, respectively, and the personal computers 3 and 4 are respectively connected via the wireless transmitting and receiving units 3a and 4a.
This control signal cont is also directly input to 4. Each wireless transmission / reception unit complies with, for example, IEEE 802.11b, which is a wireless LAN standard.

Even when the wireless connection is made in this manner, the above-described ID collation processing is performed by the personal computers 3 and 4, respectively, so that only the personal computer having the same ID follows the control signal cont. Is performed.

In the examples of FIGS. 11 to 15 described above, the present invention is applied to a system using an electronic whiteboard on which an image from a projector is projected. The present invention may also be employed in existing systems.

In the examples shown in FIGS. 11 to 15, the video displayed on the electronic whiteboard is switched between two personal computers, or two personal computers and two other than the personal computers are used.
An electronic whiteboard 51 and an AV selector 52 for switching between the two video output devices are configured. However, the present invention is not limited to this, and the image displayed on the electronic whiteboard is switched between three or more personal computers,
An electronic whiteboard and A for switching between a personal computer and three or more video output devices other than the personal computer
A V selector may be configured.

In the examples shown in FIGS. 11 to 15, A
Although the V selector is configured as a single device, an electronic whiteboard having a built-in AV selector function may be configured.

Further, the present invention is not limited to the above-described example, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0242]

As described above, according to the first switcher of the present invention, when switching and displaying images from a plurality of computers on an electronic whiteboard, the work load is reduced, and lessons can be obtained. The effect is that the meeting can proceed smoothly.

Next, according to the second switcher of the present invention, the burden of operation is reduced when switching between the video from the computer and the video from the video output device other than the computer on the electronic whiteboard. As a result, it is possible to obtain an effect that a class or a conference can proceed smoothly.

Further, since the operation of the video output device while displaying the video from the video output device can be performed by the electronic whiteboard, the effect of further reducing the operation load can be obtained.

Next, according to the third switcher of the present invention, when switching and displaying images from a computer and images from a plurality of image output devices other than the computer on the electronic whiteboard, the operation and the This has the effect of reducing the burden on the operation and allowing lessons and meetings to proceed smoothly.

In addition, since the operation of the video output device while displaying the video from the video output device can be performed by the electronic whiteboard, the effect of further reducing the operation load can be obtained.

[0247] Next, according to the electronic whiteboard system of the present invention, the burden of operation is reduced when images from a computer and images from a video output device other than the computer are switched and displayed on the electronic whiteboard. And
The effect is that classes and meetings can be smoothly advanced.

Further, when switching and displaying images from a plurality of computers on the electronic whiteboard, it is possible to obtain an effect that the work load is reduced and a class or a conference can be smoothly advanced.

Further, even when a control signal output from the electronic whiteboard is input to all of the plurality of computers due to, for example, wireless connection between the electronic whiteboard and the plurality of computers,
The effect is obtained that this control signal can be transmitted and received only with the selected computer.

In addition to operating the computer by touching the screen of the electronic whiteboard, the computer is operated using a keyboard provided on the electronic whiteboard itself (for example, a number of operations that are difficult only by touching the screen). Input of characters, etc.), and when the video output device is selected, the video output device can be operated using the controller provided on the electronic whiteboard itself, so that the operation burden is further increased. The effect of being reduced is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a conventional electronic whiteboard system.

FIG. 2 is a diagram showing an example of an electronic whiteboard system employing the switcher of the present invention.

FIG. 3 is a block diagram illustrating a configuration of an AV selector of FIG. 1;

FIG. 4 is a view showing a display screen of the electronic whiteboard of FIG. 1;

FIG. 5 is a flowchart illustrating a process executed by a CPU of the AV selector in FIG. 1;

FIG. 6 is a diagram showing an example of an electronic whiteboard system employing the switcher of the present invention.

FIG. 7 is a block diagram illustrating a configuration of an AV selector of FIG. 6;

8 is a diagram showing a display screen of the electronic whiteboard of FIG.

FIG. 9 is a flowchart illustrating a process executed by a CPU of the AV selector of FIG. 1;

FIG. 10 is a diagram showing a display screen of the electronic whiteboard of FIG. 6;

FIG. 11 is a diagram showing a configuration example of an electronic whiteboard system according to the present invention.

FIG. 12 is a block diagram illustrating a portion related to the present invention in the circuit configuration of the electronic whiteboard in FIG. 11;

FIG. 13 is a flowchart illustrating a process executed by a CPU of the electronic whiteboard in FIG. 11;

FIG. 14 is a block diagram illustrating a configuration of the AV selector of FIG. 11;

FIG. 15 is a flowchart illustrating a process executed by a CPU of the AV selector in FIG. 11;

FIG. 16 is a diagram showing a modification of the system in FIG. 11;

[Explanation of symbols]

1, 7, 52 AV selector, 2, 51 electronic whiteboard, 3, 4 personal computer, 5 projector,
6 speakers, 8 material presentation device, 9 DVD player, 20, 39, 61, 71 CPU, 53 keyboard, 54 AV controller, 62 serial interface, 21-23, 40-43 changeover switch, 44 mixer, 45 pattern generator,
SW1 to SW4 Operation switches for electronic whiteboard

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C071 CA02 CA04 CC01 DA05 DB09 2H021 AA00 5B069 AA01 AA02 BA10 KA06 5C082 AA03 AA22 AA24 AA27 AA34 BA02 BA12 BA27 BA34 BA35 BD06 CA76 CB05 DA01 MM09

Claims (15)

[Claims] 1. An operation means for performing an operation of selecting any one of a plurality of computers, and an image projection means for projecting an image on an electronic whiteboard,
A video signal is supplied from the computer selected using the operation means, and a control signal to be transmitted and received between the electronic whiteboard and the computer is selected using the electronic whiteboard and the operation means. And a switching means for transmitting and receiving to and from a computer. 2. The electronic whiteboard switcher according to claim 1, wherein the operation unit outputs a video signal of an icon for selecting one of the plurality of computers to a computer. An electronic whiteboard switcher characterized by being executed. 3. The switcher for an electronic whiteboard according to claim 1, wherein said operation means is an operation button provided on a device including said switching means. 4. A means for causing a computer to execute a process of outputting a video signal of an icon for selecting one of a computer and a video output device other than the computer, and a video projection for projecting a video on an electronic whiteboard By means,
A switcher for an electronic whiteboard, comprising: control means for selecting a video signal from the computer and the video output device selected by the icon. 5. The electronic whiteboard switcher according to claim 4, wherein: a means for generating a video signal of an icon for selecting one of the computer and the video output device; and a video of the icon. Means for combining a signal with a video signal from the video output device. 6. The switcher for an electronic whiteboard according to claim 4, wherein: a means for generating a video signal of an icon for operating the video output device; and transmitting the video signal of the icon from the video output device. An electronic whiteboard further comprising: means for synthesizing the image signal of the electronic whiteboard; and control means for controlling the image output device in response to a display position of the icon on the electronic whiteboard being touched. Switcher. 7. An operation means for performing an operation of selecting which one of a computer and a plurality of image output devices other than the computer to display an image on the electronic whiteboard, and the operation means Switching to supply a video signal from the selected video output device to video projection means for projecting a video on the electronic whiteboard when one of the plurality of video output devices is selected using the video output device. An electronic whiteboard comprising: means for controlling the video projection means to select a video signal from a computer selected from the computer and the video output device using the operation means. Switcher. 8. The switcher for an electronic whiteboard according to claim 7, wherein said operating means outputs a video signal of an icon for selecting one of said computer and said plurality of video output devices. A switcher for an electronic whiteboard, which causes a computer to execute a process of outputting. 9. The electronic whiteboard switcher according to claim 7, wherein said operation means is an operation button provided on a device including said switching means and said control means. Board switcher. 10. The electronic whiteboard switcher according to claim 7, wherein a video signal of an icon for selecting one of the computer and the plurality of video output devices is created. And a means for combining the video signal of the icon with the video signal from the video output device selected using the operation means. 11. The electronic whiteboard switcher according to claim 7, wherein: a means for generating a video signal of an icon for operating the video output device; Means for combining with the video signal from the video output device selected using the operating means, and selecting using the operating means in response to the display position of the icon on the electronic whiteboard being touched A switcher for an electronic whiteboard, further comprising control means for controlling the image output device. 12. An electronic whiteboard having an operation button for selecting one of a computer and an image output device other than a computer on a portion other than the screen, and projecting an image on the electronic whiteboard. An electronic whiteboard system comprising: a video projection unit; and a control unit that selects a video signal from a computer selected from the computer and the video output device using the operation button. 13. The electronic whiteboard system according to claim 12, wherein the operation button is for selecting one of a plurality of computers and a video output device other than the computer, and First switching means for supplying a video signal from a computer selected using the operation buttons to video projection means for projecting a video on an electronic whiteboard; transmission and reception between the electronic whiteboard and the computer An electronic whiteboard system further comprising: a second switching unit configured to transmit and receive a control signal between the electronic whiteboard and a computer selected using the operation button. 14. The electronic whiteboard system according to claim 13, wherein said second switching means is means for assigning an identification code to each of said plurality of computers, and said control signal is selected by said operation button. Means for adding the identification code assigned to the assigned computer; means for causing each of the plurality of computers to compare the identification code assigned to the computer with the identification code added to the control signal And an electronic whiteboard system comprising: 15. The electronic whiteboard system according to claim 12, wherein a keyboard for operating the computer, a controller for operating the video output device, When the computer is selected by the operation button,
To a control signal corresponding to the operation of the keyboard, information for identifying the computer selected by the operation button is added and output, and when the video output device is selected by the operation button, the control signal of the controller is output. Output processing means for adding information for identifying the video output device selected by the operation button to a control signal corresponding to the operation, and outputting the control signal, wherein the control output from the output processing means is further provided. When information for identifying the computer is added to the signal, the control unit causes the computer identified by the information to execute processing according to the control signal, and outputs the video output to the control signal output from the output processing unit. When information for identifying a device is added, the video output device identified by the information is transmitted to the control device. An electronic whiteboard system, further comprising means for controlling according to a rule signal.