JPS6220467A - Electronic blackboard device - Google Patents

Abstract

PURPOSE:To make it possible to retouch and correct an image by projecting an image recorded on a recording medium onto a retouching medium and reading the projected image and the retouched image simultaneously by a photoelectric converting means. CONSTITUTION:After an image A is written on a writing medium 1 with a writing tool, a reading unit 4 is moved in the subscanning direction. At this time, a light source 7 of the unit 4 is turned on, and the reflected light is made incident on a photoelectric transducer array 9. The read electric signal is recorded as the image A on a transparent film 13 by a recording meand 10 and this film 12 is ejected. In case that the image A recorded on the transparent film 12 is reproduced on the medium 1, the film 12 is set to an OHP device 14. In case that the reproduced image A is retouched and corrected, images B and C are written with the writing tool. The unit 4 is moved again to read images A, B, and C after retouching and correction.

Description

[Detailed Description of the Invention] Field of Application in the CM Business] The present invention relates to an electronic blackboard device that is capable of reducing and outputting an image written on a writing medium that functions as a blackboard in a printed format. be.

[Conventional technology]

As a conventional electronic whiteboard device of this type, for example,
There is one disclosed in Japanese Patent No. -212070.

This electronic whiteboard device uses ancillary utensils such as felt ben.
A milky-white sheet-like writing medium called a so-called whiteboard on which entire images such as letters and figures can be written and the written images can be easily erased with a cloth, etc., while moving on the surface of the writing medium. photoelectric conversion means t- which optically enhances the image written on the writing medium and converts it into an electrical signal;
It has a V1 capture unit, a memory section that stores the electric signal from the photoelectric conversion means as an image, and a memory section that stores the electric signal from the photoelectric conversion means as an image, and a predetermined size, e.g. It is equipped with a recording means for recording on a recording medium such as paper, so that the medium can be used as a blackboard, and the information written on the medium can be used as a blackboard. It is possible to copy and record the required number of II images on the spot.

Note that the medium described in item 1 above is formed in advance to a size that covers multiple sides and is wound around two shafts, so that the screen can be transferred by feeding it out from one shaft and winding it up on the other shaft. mosquito,
Alternatively, it can be formed into an endless shape and wrapped around the shaft of the sand bed, so that the screen can be moved by rotating the shaft.

'19. As the recording means, a friend thermal printer using a thermal head or a printer using the Kameko photo method is used.

[Problem that the invention seeks to solve]

However, in the conventional device described above, υ
Images recorded on a recording medium or other small media cannot be enlarged and reproduced on a transfer medium, and it is not possible to make additions and corrections to the image to obtain a recorded image again. The problem was that I couldn't do it.

As a way to deal with this problem, since the writing medium has the size of multiple sides, the image written on one screen of the writing medium is not completely erased, but the image is saved by moving the screen υ. One possible method would be to write the next image using another screen, and then return the screen to make additions and corrections to the previous image if necessary, but there are limitations such as the size of the device. Since the length of the recording medium is limited to five screens at most, there is a natural limit to the number of images that can be saved.

The present invention has been made to solve these problems, and is to reproduce an image recorded in a reduced size on a recording medium in an electronic blackboard device, or an image recorded on another small medium and enlarged on a silver plot. The overall purpose of the present invention is to realize an electronic blackboard device ftt- which is capable of reading and reducing all of these images after making additions and corrections to the images.

[Problem T-Friendly means to solve it]

To achieve the above-mentioned purpose, a switch means for turning on/off the power to the light source provided in the reading unit, and an optical projection system for projecting the image onto the recording medium. There are a lot of things.

[Effect]

According to the nine means described above, an image recorded in a reduced size on a recording medium by the recording means or an image recorded on another small medium can be projected onto the Satsuki medium by the optical projection system. Then, in addition to this projected next image, use a writing tool to create a new image on the medium! The image is subjected to additional and fourth corrections by inputting the image, and with the light source of the reading unit energized to t-0FF and turned off, the modified image is used as illumination light from the optical projection system and the photovoltaic light source of the reading unit is used as illumination light. It is read by the converting means and recorded on a small recording medium by the recording means.

Therefore, it is possible to enlarge and reproduce an image recorded on a recording medium in a convenient manner, and it is also possible to make additions and corrections to this reproduced image and record the image. Become.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the electronic whiteboard device according to the present invention, FIG. 2 is a perspective view showing its operation, and FIG. 3 is a plan view showing the internal structure of the reading unit in FIG. 1.

In the figure, reference numeral 1 is a milky white sheet-like writing medium that functions as the blackboard mentioned above, and here it is shown as a fixed memorandum of the size of one screen, but it is not shown as the size of multiple double-sided pages. It is wound around two shafts so that it can be unwound from one shaft and taken up by the other shaft at the same time to advance the screen, or it can be formed into an endless shape and wound around multiple rollers, which then rotates. It may be configured so that the screen can be changed by doing this.

Guide rails 2 and 3 are arranged in parallel above and below the recording medium 1, and a reading unit 4 is mounted on the guide rails 2.3.
Both upper and lower ends of the unit are slidably attached.

As shown in FIG. 3, this reading unit 4 consists of a case 6 whose surface facing the writing medium 1 is open and whose opposite surface has all vertically long slits 5, and a light source arranged around the case 6. 7, a rod lens array 8, and a photoelectric conversion element array 9 as an image reading means, and is reciprocated in the direction of an arrow 49 by a driving means including a motor (not shown).

Here, as the light source 1, a long straight line in a direction perpendicular to the longitudinal direction of the supply and distribution medium 1, for example, a fluorescent lamp, is used, and the rod lens array 8 is provided with a rond lens in the longitudinal direction of the light source T. Furthermore, the photoelectric conversion element array 9 is constructed by arranging a large number of photoelectric conversion elements in the longitudinal direction of the light source T at a pitch equal to the reading resolution. The entire surface of the writing medium 10 is irradiated with light, and the reflected light? The image on the aged medium 1 is converted into a photoelectric signal by making it incident on the optical beam array 9 through the rod lens array 8, and the element array 9 reads one line at a time and converts it into an electric signal. .

Reference numeral 10 denotes a recording means, for example, a T-photo printer is used, and this recording means 10 is connected to the reading unit 4 via a signal line 11.

The above configuration is the same as the conventional one except that the case 6 of the reading unit 4 is provided with a slit 5t.

Reference numerals 12 and 13 are transparent films, for example, A4 size, used as the recording medium of the recording means 10.

Reference numeral 14 denotes an oHp (overhead glossor) device used as an optical projection system. 1
This embodiment is configured according to 7. 0) IP device 14t - facing the surface of the writing medium 10, and transmitting to the light 97 of the reading unit 4 (not shown) A switch means is provided.

Next, the operation of the above-described configuration will be explained.

First, as shown in FIG. 1, for example, one person #
After writing the image GL with a writing tool, read unit 4
t-Move in the direction of arrow A, which is the sub-scanning direction, by a driving means (not shown). At this time, the light source T of the reading unit 4
Electricity is turned on by a switch means (not shown), so that the light source T is automatically turned on at the same time as the light source T is moved. As the unit 4 moves, the surface of the writing medium 1 is sequentially irradiated, and the reflected light passes through the rod lens array 8 to the photoelectric conversion element array 9.
By entering the conversion element, the image 1AI is read before υ and converted into an electrical signal.

The line part of the image IA' has a low reflectance, and the white part of the writing medium 1 has a high reflectance, so the photoelectric conversion element The other parts are converted into electrical signals as black and white.

Then, main scanning is performed by sequentially and time-sequentially extracting the electrical signals of these photoelectric conversion elements using a switch circuit (not shown), etc. -'lit signal is sent as image information to the recording means 10 via the signal line 11t, so that the recording means 10 records the transparent film 12.
One image per person is recorded in a reduced size and discharged.

When the reading unit 4 moves to the right end of the guide rail 2.3 and finishes reading, it moves in the direction of the exit and returns to the left end of the guide rail 2.3 and waits. The lights go out.

Next, after the next image A written on the writing medium 1 is erased, the image 1' is reduced and recorded on the transparent film 12.
When enlarging and reproducing on the T-brush distribution medium 1, as shown in FIG.
The film is set on the film support stand 15 of the HP apparatus H4, and the light source ff1R on this support stand 15 is turned on. Thereby, the image %A' of the transparent film 12 is projected onto the writing medium 1 by the reflecting mirror 16 and the lens 11. The image %A' of the transparent pick film 13& is enlarged and reproduced on the writing medium 1.

Here, if you want to modify this reproduced image SAI, use a recording tool on the recording medium 1, and use Example 1E Vi'B'
.

t Write the entire image like Cy.

Then, when recording the image/ABC' after additions and corrections,
The reading unit 4 is moved again in the direction of arrow A to perform a reading operation.

During this reading operation, the light source T of the reading unit 4 is energized by the switch means (not shown).
Set to OFF so that lights # and 7 are not affected. However, since the surface of the writing medium 1 receives the projection light of 01(Pi[14), the written image %BC' will be illuminated by this projection light.

On the other hand, when the 'P& taking unit 4 transfers over the writing medium 1, part of the projection light will be blocked, but since the case 6 of the KC taking unit 4 is provided with the slit 5, Projection light enters from this slit 5 as indicated by arrow C in FIG. 3 and illuminates the writing medium 1t, and the reflected light passes through the rod lens array 8t and enters the photoelectric conversion element array 9.

Accordingly, by the movement of the reading unit 4, the image 'ABC.

In other words, the part of the line A' projected by the OHP equipment fiffll 4 is converted into an electrical signal as black because the projected light is small and dark, and the part of the image 1B' and %CI receives bright projected light. As black because the reflectance is low;
The other part is converted into an electric signal as the background color of the writing medium 1 is white.

These signals are sent as image information to the recording unit 10 via the signal line 11 in the same way as described above, and the recording means 10 records the image ``ABC'' in a reduced size on the transparent film 13. The image projected onto the basket memorandum 1 by the OHP temporary storage 14 and the image written on the writing medium 1 with the auspicious tool are simultaneously synthesized, and when the basket memorandum 1 is used by a human. A reduced record can be obtained in the same way as in the case of visual comparison.

Note that reproduction of images recorded on other small media, addition and correction of the reproduced images, and subsequent recording can also be performed in the same manner as P1.

FIG. 4 is a plan view showing another example of the reading unit 4 used in the present invention, and this reading unit 4 includes a light source 7 and a writing medium 1.
The reflected light from lol! Half mirror 18 that bends at right angles
Then, two pieces of anti-#g & 19 m placed diagonally opposite each other to trace the optical path of the light from this half-sized 18.
19b, a CCD image sensor 20 as a means for taking the image 1, and a light from the reflecting mirror 19b to the COD.
Image sensor 2QKg? Next small projection/zu 21
In this case, the projection light from the OHP device 14 is transmitted through the half mirror 111 as shown by arrow 2 and illuminates the recording medium 1.

Even in this case, as in the case of FIG. 3, the image on the writing medium 1, the image projected by the OHP device 14, and the image written with the writing utensil are all read and converted into electrical signals. can be converted.

It should be noted that the present invention is not limited to the above-mentioned examples,
For example, if the writing medium 1 is completely translucent, there is an OHP on the back side.
i1f11'' arrangement, it is possible to write an image with the writing tool from the front side and to project an image from the OHP device 14 from the back side, and to combine the two images. This eliminates the need to place the 0FLP device on the side of the room where the writing medium 1 is viewed visually, and also eliminates the need to provide a slit in the case 6 of the optical unit 4. Furthermore, the design of the optical unit 4 is free. It can be increased completely.

However, as the optical projection system, in addition to the above-mentioned OHP mounting 14, it is also possible to use a slide projector, a funny object projector, a video projector, etc.

Further, the recording means 1G may be a printer other than an electronic method as long as it is capable of recording images on transparent film and paper, and it may be possible to print a plurality of sheets by adding a memory for storing image information to the recording means 10, etc. You can obtain the same hard copy.

〔Effect of the invention〕

As explained above, the present invention includes, in addition to the conventional functions, a switch means for energizing the light source of the reading unit 0N10FF' and an optical projection system, so that the recording means can record a small amount of information on the recording medium. 7' (Images recorded on other small media can be projected onto the medium by the optical projection system; previously recorded images or other images can be enlarged onto the medium. The effect is that it can be reproduced by

However, in addition to the image reproduced on the recording medium, by writing on the surface I image on the recording medium using a writing tool, it is possible to apply electrical correction to the image, and furthermore, this addition corrects the image. Since the image can be read by the photoelectric conversion means in a state where the light of the reading unit is completely turned off by the switch means,
Another advantage is that it is possible to record images that have been corrected.

Furthermore, by using a transparent film as the recording medium of the recording means, there is the advantage that the entire original image sheet for optical projection can be directly created, and the function as an electronic blackboard device can be comfortably enhanced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the electronic whiteboard device according to the present invention, FIG. 2 is a perspective view showing its function, FIG. 3 is a horizontal plan view of the internal structure of the reading unit in FIG. FIG. 4 is a plan view showing another example of the reading unit. 1... Instruction medium 2.3... Guide rail 4...
・Reading unit T...Optical C9...Photoelectric conversion element array 10...Recording means 12.13...Transparent film 14...OHP device 20...CCD image sensor patent Applicant Oki Electric Industry Agent for Co., Ltd. Patent attorney Takashi Kanakura Two procedural amendments (voluntary) November 6, 1985

Claims (1)

[Claims] 1. A writing medium on which images can be written and erased; a light source that is provided to move along the surface of the writing medium and illuminates the writing medium; A reading unit including a photoelectric conversion means for optically reading and converting it into an electric signal, and a recording means for recording an image on the writing medium in a reduced size on a recording medium as image information by using the electric signal from the photoelectric conversion means. An electronic whiteboard device comprising: a switch means for turning ON/OFF electricity to a light source of the reading unit; and an optical projection system for projecting an image onto the writing medium. 2. The electronic whiteboard device according to claim 1, wherein a transparent film is used as the recording medium. 3. The electronic whiteboard device according to claim 1, characterized in that an optical projection system is disposed on the surface side of the writing medium. 4. The electronic whiteboard device according to claim 1, wherein the writing medium is semitransparent, and an optical projection system is disposed on the back side of the writing medium.