JPS63261956A - Electronic whiteboard device with document input and enlarged display functions - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electronic blackboard device that also has a function of enlarging and displaying documents in hand on a blackboard surface.

[Prior art] In addition to the function of copying the content written on the blackboard surface,
2. Description of the Related Art An electronic blackboard having the ability to enlarge and display documents in hand on a blackboard surface is already known, as shown in, for example, Japanese Patent Application Laid-Open No. 60-263557M. With such an electronic blackboard, you can copy what you wrote on the blackboard later, so you don't have to take notes every time. On the other hand, you can enlarge documents you have on the blackboard as appropriate, so you don't have to overdo it in meetings, etc. It has the advantage that it is not necessary to prepare a RAD projector or a wall map in advance, so it can be said that it is very useful.

[Problems to be Solved by the Invention] However, the electronic blackboard disclosed in the above-mentioned publication sends an image signal to a felt-tip pen placed opposite to the surface of the writing medium.
The felt-tip pen runs on the surface of the writing medium based on the image signal and records an enlarged image in a serial plot manner. Therefore, the electronic blackboard disclosed in this publication has drawbacks such as slow recording speed due to the plotting method using felt-tip pens, poor resolution, and unclear outlines of enlarged images.

[Object of the invention] The present invention has been made in view of the above problems, and
The purpose of this is not only to enhance the ability to enlarge and display handheld documents on the blackboard surface, but also to display the enlarged image in a short time while improving the resolution and sharpness of the enlarged display image. Our goal is to provide an excellent electronic blackboard.

"Means for Solving the Problems" To achieve this purpose, the electronic blackboard with document input/enlargement display function of the present invention includes a writing medium that can be written on, and a device for reading characters, figures, etc. on the surface of the writing medium. , a device for copying content read by the device, wherein a magnetic recording medium is disposed facing the writing medium surface, a device for reading an input document, and a device for copying the content read by the device. means for enlarging the content as a magnetic latent image on the surface of the magnetic recording medium; means for attaching magnetic toner to the surface of the magnetic latent image to embody it as a visible image; and applying the visible image of the magnetic toner to the writing medium. The gist is that each of the images is provided with a means for transferring the image onto the surface.

[Function] With such a configuration, according to the electronic blackboard of the present invention, the document content read by the input document reading device is
First, it is enlarged and applied as a magnetic latent image on the surface of the magnetic recording medium, and then realized as a visible image using magnetic toner, and then recorded and displayed on the surface of the writing medium.

[Example] Hereinafter, an example of an electronic whiteboard embodying the present invention will be described in detail with reference to the drawings. In the illustrated electronic blackboard with an enlarged display function, an endless sheet-like writing medium 11 that can be written with a felt-tip pen or the like is stretched around between two support rollers 9a and 9b, and is connected to one of the support rollers 9a. It is configured to be sent in the direction of the arrow in FIG. 1 by driving the motor 10. A drum-shaped magnetic recording body 20 is disposed to face the surface of the writing medium 11, and a magnetic latent image is formed on the surface of the magnetic recording body 20 based on the image signal of the input document on the peripheral surface of the magnetic recording body 20. a magnetic recording head 15 for enlarging and imparting a magnetic latent image; a toner developing device 17 for attaching magnetic toner to the surface of the magnetic latent image to form a visible image; A transfer corotron 19 for transferring, a cleaner 18, an erasing head 16, etc. are attached. In this case, the magnetic recording body 2
0 is CrO2, TFe203, Co-N! - Magnetic particles such as P are coated on the surface of the magnetic recording head 15, and as shown in FIG. When current flows through the excitation coil 12 of the core 13, a magnetic field 14 is generated in the core 13, and a leakage magnetic field 14 is generated in the gap q, thereby magnetizing the surface of the magnetic recording body 20. It is composed of In general, magnetic toner is a mixed fine powder made of carbon black, magnetic powder (ferrite, etc.), polyester resin, etc., and the magnetic powder is blended in a thicker amount than usual. The toner developing device 17 is a transfer corotron 1.
In order to assist the transfer of toner onto the writing medium 11 by the copying machine 9, it is provided with a toner charging function like a normal copying machine.

On the other hand, an image scanner 21, which is a device for reading documents in hand, is provided on the front of the blackboard body, and the content read by the image scanner 21 is sent to the magnetic recording head 15 as an image signal. Note that this electronic blackboard with an enlarged display function has a writing medium 11.
A light source 4, a lens 6, an image reading element 5, a recording device 7 for making a reduced copy of the content read by the reading element 5, and a paper tray for taking out the copy as a means for copying the content written on the surface. 22 etc. is attached as in the conventional case.

Next, the operation of the device of the present invention will be explained. When a handheld document is read by the image scanner 21 and the magnetic recording head 15 is energized based on the read image information,
A magnetic latent image with a predetermined magnetization pattern is formed on the surface of the magnetic recording body 20 which is rotated at a constant speed. Next, magnetic toner is attached to this magnetic latent image surface by a toner developer 17 to darken the visible image, and this visible image is transferred to the surface of the writing medium 11 via a transfer corotron 19. and writing medium 1
1 is rotated by the drive of the motor 10 and is pulled out to the front of the blackboard body. When you want to copy this recorded content 18, the writing medium 11 is fed at a predetermined speed, the light source 4 is turned on at the same time, the recording surface of the magnetic writing medium 11 is illuminated, and the reflected light is reflected by the lens 6. By condensing the light and reading it with the reading element 5, the contents are reduced and copied by the recording device 7. The copy paper is sent to paper tray 22. The magnetic toner is removed from the writing medium 11 by a cleaner 18, the magnetic latent image is erased by an erasing head 16, and the next recording is performed. In this way, it is possible to record and erase information on the writing medium 11 many times. Note that the display magnification rate for the input document on the 11 surfaces of the writing medium is preferably a magnification rate that assumes a magnification rate as a substitute for OHP or the like.

[Effects of the Invention] As explained above, according to the electronic blackboard according to the present invention, input documents, etc. can not only be enlarged and displayed on the blackboard surface, but also
The enlarged image is displayed at high speed by organic application of electromagnetic recording means and magnetic toner, and with excellent resolution and sharpness due to fine image signal control. Furthermore, it is possible to make a copy of the image, and it also has features that go beyond its function as an OHP substitute, making it possible to speed up meetings and improve efficiency.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an electronic whiteboard according to an embodiment of the present invention, FIG. 2 is an enlarged view of the main parts thereof, and FIG. 3 is an external perspective view of the electronic whiteboard. 4... Light source, 5... Reading element, 7... Recording device, 11... Writing medium, 15 Magnetic recording head, 17...
-Magnetic toner developer, 20...magnetic recording body.

Claims (1)

[Scope of Claims] An electronic whiteboard device comprising a writable writing medium, a device for reading characters, figures, etc. on the surface of the writing medium, and a device for copying the content read by the device, comprising: A magnetic recording body is arranged facing the medium surface, and
A device for reading an input document, a means for enlarging and applying the content read by the device as a magnetic latent image on the surface of the magnetic recording medium, and a means for attaching magnetic toner to the surface of the magnetic latent image to embody it as a visible image. , and means for transferring a visible image of the magnetic toner onto the surface of the writing medium.