JPS63232747A - Electronic blackboard - Google Patents

Abstract

PURPOSE:To obtain a picture which is easy to always read by drawing the erecting picture of a bit of picture information recorded on the medium, the size which corresponds to a small-sized recording medium, on a writing medium, by using a selecting means. CONSTITUTION:When an electronic blackboard is used for a conference or the like, a character or a pattern can be written on the surface of the writing medium by an aqueous marking pen, and the character and the pattern or the like can be freely erased by an eraser. When the picture of the character, the pattern or the like, written on the writing medium, are required to be recorded on a paper and a starting botton and the designating button of the desired number of copied sheets on an operation panel 45 are operated, the writing medium is shifted rotationally clockwise by the rotation of a motor, and simultaneously, the picture on the writing medium is contracted and read by a first reading element 10. The read picture information is stored in a RAM 43 for a while, and simultaneously, the picture information is recorded on the prescribed paper as it is in the contracted state, by the operation of a recorder 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electronic blackboard device that can write on a writing medium arbitrarily, read the contents optically, and output the contents to a recording medium.

[Prior Art] Conventionally, in this type of electronic blackboard, image information such as characters and figures drawn on a small paper (for example, A4 size paper) is read by a reading means equipped with an image scanner or the like, and the image information is Based on this, an electronic blackboard has been invented which has a function of automatically enlarging characters and figures on a large display surface (hereinafter referred to as a writing medium) of the electronic blackboard using automatic writing means.

[Problems to be Solved by the Invention] However, in the electronic blackboard having an enlarged display function, the main scanning direction of the reading means and the main scanning direction of the automatic writing means are fixed (generally, the main scanning direction of the reading means is fixed). In the case of automatic writing, the direction of the short side of the document is taken as the main scanning direction, and in the case of automatic writing, the direction of the short side of the writing medium is taken as the main scanning direction, and the direction perpendicular to the main scanning direction is taken as the sub-scanning direction). Therefore, the reading means that reads the image on the document is used when the image information is vertically long (this case is referred to as a vertically long image) and when the image information is horizontally long (this case is called a vertically long image).
If both sides of the document are read (this case is referred to as a landscape image) and the automatic writing means enlarges and displays the original, the image written on the writing medium may be turned sideways (referred to as an inverted image). This creates the problem that it is difficult for users to read.

[Object of the Invention] The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an easy-to-read electronic blackboard in which an inverted image is not written on a writing medium. .

[Means for Solving the Problems] In order to achieve the above object, in the electronic whiteboard of the present invention, image information recorded on a medium of a size corresponding to the small recording medium is scanned by main scanning. a second reading means that reads the image information sequentially along the sub-scanning direction while repeating the above; a storage means for storing image information; and a first output means for outputting image information along the sub-scanning direction for each main scan in the order in which the image information is read from the storage means after the image information is stored in the storage means; a second output means for sequentially outputting the image information from the storage means in sub-scanning units along the main scanning direction after the image information is stored in the storage means; The writing device includes a selection device for selecting an output from one of the output devices, and a writing device for automatically writing on the writing medium based on the image information output from the first or second output device.

[Operation] According to the invention having the above configuration, the selection means can be used regardless of whether the image information recorded on a small recording medium or a medium of a suitable size is a vertically long image or a horizontally long image. Accordingly, image information is output from the first or second output means to the writing means so that the image written on the writing medium always becomes a royal image.

[Example] Hereinafter, an example of an electronic whiteboard embodying the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the main body 1 of this electronic blackboard
It has a substantially box-like shape with an open front, and a pair of support legs 2 and a tray 3 for holding a pen are provided at the bottom thereof. A pair of upper and lower parallel rollers 4 rotatably disposed at a predetermined interval within the main body 1 are stretched with an endless sheet-like writing medium 5 made of a dielectric material. The writing medium 5 is moved upward or downward as the upper roller 4 is rotated via a toothed pulley 7.8 and a timing belt 9 as the motor 6 rotates.

As shown in FIG. 3, the writing medium 5 is provided with a conductive layer 5b treated with a material exhibiting electronic conductivity such as a metal oxide on a base material 5a made of a polyester film, etc.
A resin layer 5 made of an insulating material such as silicone resin on its surface
It is constructed by coating C. Therefore, this writing medium 5
In addition to being able to write letters and figures with a water-based marking pen and erasing them with an eraser, it is also possible to perform electrostatic recording as described below.

As shown in FIG. 2, the first reading element 10 provided in the upper part of the main body 1 reads the characters 9 written on the writing medium 5.
When an image such as a figure is irradiated by a fluorescent lamp 11, it is read in a reduced state through a reflecting mirror 12 and a lens 13.

As shown in FIG. 1, a recording device 15 provided at the rear of the main body 1 records the image information read by the first reading element 10 on a predetermined sheet of paper in a reduced form. The copy receiver provided on the lower right side of the is tray 1.
It is designed to be discharged at 6. A second reading device @ 1 consisting of an image reader etc. provided at the lower left side of the main body 1
7 is when the paper for reading is inserted from the paper insertion section 18;
Images such as characters, figures, etc. drawn on the paper are read, and when the reading is completed, the paper is discharged to a document receiving tray 19.

The electrostatic recording device 20 provided at the lower part of the main body 1 records image information read by the second reading device 17 on the writing medium 5 in an enlarged state using an electrostatic method. There is.

The electrostatic recording device 20 includes a static eliminator 21 for removing residual germ potential on the writing medium 5, and a cleaning brush 23 and a blade 24 for removing residual toner on the writing medium 5.
a charging device 25 that forms a uniform electrostatic charge distribution on the writing medium 5 by corona charging;
A latent image forming device 26 consisting of a multi-stylus head or the like that erases the static charge on the writing medium 5 based on the image information read by the second reading device 17 and forms an electrostatic latent image; #I image as charged fine particles toner 28
Using! A developing image forming device 27 having a developing roller 29 for forming an RL image is provided.

The cleaning brush 23 of the cleaning device 22 and the developing roller 29 of the image forming device 27 are rotated in conjunction with the rotation of one motor 30 via pulleys 31, 32, 33 and belts 34, 35. It has become.

Next, a control circuit for controlling the electronic whiteboard configured as described above will be explained with reference to FIG.

A central processing unit (CPU) 4'l constitutes a control means, and the CPU 41 includes a read only memory (ROM>42.
A random access memory (RAM>43, an image data vertical/horizontal conversion circuit 52, an image data selection circuit 53, etc.) are connected.

A program for controlling the entire operation of the electronic blackboard is recorded in the ROM 42. The RAM 43 temporarily stores the image information read from the writing medium 5 by the first reading element 10 and the image 1-1 read from the second reading device 17 and selected by the image data selection circuit 53. A storage area and the like are provided. The image data vertical/horizontal conversion circuit 52 has a function of converting image data temporarily stored in the RAM 43 and rotating the image by 90'. The image data selection circuit 53 has a function of passing part or all of the image data read by the second reading device 17 to the CPU 41 according to a command from the CPU 41 .

The CPU 41 includes a first reading element 10, a second reading device 17, a position detector 44 provided in the main body 1 for detecting the moving position of the writing medium 5, and an operation panel provided on the right front side of the main body 1. 45 is connected and the operation panel 45
is a start button 45a for the recording device 15, a button 45b for specifying the number of copies, a button 45G for setting the reading range of the document read by the second reading device, and a button 45G for specifying whether the image written on the document is a portrait or landscape image. button 45
d etc. An operation panel 45 is connected via an input interface 46, from which various information and signals are input to the CPU 41. Further, a motor 30 for a recording device 15, a latent image forming device 26, a visible image forming device, etc., and a motor 6 for moving a writing medium are connected to the CPU 41 via an output interface 47 and drive circuits 48 to 51.
Drive and stop signals are output from the CPU 41 to them.

Next, the image processing of this embodiment will be explained based on FIGS. 4 to 6.

The enlargement ratio of this image is trained within the control device so that the image within the range specified by operating the reading range setting switch 45G of the operation unit 45 is written upright on the writing medium 5 and is maximized. calculated.

FIG. 4 shows the original 70 and the image written on the writing medium 5 when the reading range setting switch 45C of the operation unit 45 specifies that the entire surface of the original 70 on which a vertically long image is written is to be read.

FIG. 5 shows a document 71 and an image written on the writing medium 5 when reading the entire surface of the document 71 on which a horizontally long image is written is specified.

In FIG. 6, when it is specified that the left half of a horizontally long original 72 is to be read, the portion indicated by a broken line is written on the writing medium 5.

As shown in FIG. 4, when writing the entire vertically long original 70 on the writing medium 5, the user operates the reading range setting button 45C and the specification button 45d. Among the pixels of one main scan read by the second reading device 17, the image data selection circuit 53 selects the same number of pixels as the number of pixels of one main scan of the latent image forming device 26, and sets them as image data for one line. .

In a similar manner, the second reading device reads image data for one screen of the document, and the CPU 41 constituting the first output means outputs the image data to the latent image forming device 26 in the order of reading.

When writing the entire document 71 in the horizontally long image shown in FIG.
operate. Of the pixel information for one main scan read by the second reading device 17, the image data selection circuit 53 selects the same number of pixel information as the number of main scans (the number of lines) when forming an image by the latent image forming device 26. Select one line of image data. The above-described process is roughly repeated, and one of the data of each line read by the second reading device is read by the latent image forming device 26.
The image data selection circuit 53 selects only the same number of lines as the number of pixels in the main scan and stores them in the RAM 43 as valid image data. Subsequently, the image data vertical/horizontal conversion circuit 52 serving as a second output means rotates the image data stored in the RAM 43 by 90' in a manner described later to create erect image data, and outputs it to the latent image forming device 26. Output as image data.

When writing the first half of the horizontally long original 72 on the writing medium 5 so that the image is erected as shown in FIG. 6, the user operates the reading range setting button 45C and the designation button 45d. Of the pixel information of one main scan read by the second reading device 17, the image data selection circuit 53 selects the same number of pixels as the number of lines when forming an image by the latent image forming device 26, and the image data for one line is generated. Data. Further, among the lines in the front half of the document selected in the same manner, the CPU 41 stores the same number of lines as the number of pixels in one main scan of the latent image forming device 26 in the RAM 43 as valid image data. followed by R
An image data vertical/horizontal conversion circuit 52 rotates the image data stored in the AM 43 by 90' to create erect image data and outputs it to the latent image forming device 26 as image data.

An example in which the images shown in FIGS. 5 and 6 are rotated by 90'' will be described.

FIG. 8 shows the state of the image data stored in the RAM 43 in the above explanation, and A1A2, . . ., A8, . . . represent each pixel data of the first line.

BIB2...B8... represent each pixel data of the second line. The image data vertical/horizontal conversion circuit 52 converts such image data into converted data such as AlBICl...Hl... as the first line and A as the second line.
Image data for each line such as 282C2...12... is created. This operation rotates the image by 90 degrees.

Next, the operation of the electronic blackboard configured as described above will be explained.

Now, when this electronic blackboard is used in a meeting etc., characters and figures can be written on the surface of the writing medium 5 with a water-based marking pen, and the characters and figures can be arbitrarily erased with an eraser. Be able to explain the contents of the agenda. and,
When it is necessary to record an image of characters, figures, etc. written on the writing medium 5 on a paper, when the start button and the button for specifying the desired number of copies are operated on the operation panel 45, the motor 6 is rotated. As a result, the writing medium 5 is rotated clockwise in FIG. 2, and the image on the writing medium 5 is reduced and read by the first reading element 10. This read image information is temporarily stored in the RAM 43, and the image information is recorded in a reduced state on a predetermined sheet of paper by the operation of the recording device 15. Therefore, the characters written on the writing medium 5.

There is no need to write down figures etc. on paper.

Note that in this embodiment, as described above, the first reading element 10
Since the image information read by is temporarily recorded and stored in the RAM 43, if multiple copies are required, the recorded image information is filled in and recorded on paper by the recording device 15. Therefore, there is no need to read the image on the writing medium 5 again, which can save time.

In addition, when recording and displaying characters, figures, etc. drawn on a paper on the writing medium 5, the reading range of the paper is set using the reading range setting button on the operation panel 45, and the paper is transferred to the second reading device. 17, the second reading device 17 reads images such as two characters and figures on the paper within the range set by the reading range setting button. Based on the read image information, a latent image is formed on the writing medium 5 in an enlarged state by corona charging in the latent image forming device 26 of the electrostatic recording device 20, and a latent image is formed in an enlarged state on the writing medium 5 in the developing image forming device 27.
The upper latent image is visualized using toner 28. Therefore,
There is no need to manually write characters, figures, etc. on paper onto the writing medium 5, and there is no need to prepare a manuscript written in a limited format in order to automatically write on the writing medium 5. The recording of images and Vj information on the writing medium 5 is also carried out in a short time using the electrostatic method as described above, so that meetings, etc. can proceed smoothly.

In this embodiment, since the static eliminator 21 and the cleaning device 22 are arranged corresponding to the lower part of the rear surface of the writing medium 5, the image visualized on the writing medium 5 by the image forming device 27 is not visible on the main body. Even after it is moved upward in the front opening of 1 and hidden inside the main body 1, it will not be erased for a while. For that purpose, the cleaning brush 23
, the blade 24, the latent image forming device 26, the image roller 29, etc. are separated from the surface of the writing medium 5.
By moving counterclockwise in FIG. 2, the image hidden inside the main body 1 can be moved and displayed again at the front opening of the main body 1. Furthermore, in the electrostatic recording device 20, since the image recorded on the writing medium 5 is not fixed, the image can be arbitrarily erased with an eraser and corrected with a water-based marking pen.

Furthermore, although electrostatic recording is used as an example of the recording head, other recording methods such as a thermal head, an inkjet head, a wire head, a scanning head using a semiconductor laser, etc. may also be used.

[Effects of the Invention] As explained above, according to the electronic blackboard of the present invention, images such as characters and figures written on the medium can be turned into upright images on the writing medium regardless of how the paper is used. It can be enlarged to make it easier for users to read.

[Brief explanation of drawings]

1 to 8 show embodiments embodying the present invention, FIG. 1 is an external view of one embodiment, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. The figure is a partially enlarged view of the writing medium, Figures 4 to 6 are diagrams showing the relationship between the original read by the second reading device and the image written on the writing medium, and Figure 7 is a block diagram of the control circuit. , FIG. 8 is a diagram of image data stored in the RAM. In the figure, 5 is a writing medium, 10 is a reading element, 15 is a recording device, 17 is a second reading device, 43 is a RAM, and 52
26 is an image data vertical/horizontal conversion circuit; 26 is a latent image forming device; 27 is a latent image forming device;
41 is a CPU.

Claims (1)

[Scope of Claims] A writing medium capable of writing; a first reading means for reading image information written on the writing medium while moving relative to the writing medium; and reducing the read image information. an electronic whiteboard comprising: recording means for recording on a small recording medium using a computer; a second reading means for reading; a storage means for storing the image information read by the second reading means along the sub-scanning direction for each main scan in the order in which it was read; and a storage means for storing the image information in the storage means. a first output means for outputting the image information in the sub-scanning direction for each main scan in the order in which the image information is read from the storage means; after the image information is stored in the storage means; a second output means that sequentially outputs image information from the storage means along the main scanning direction in units of sub-scanning, and selection of one of the first output means and the second output means. An electronic whiteboard comprising: a selection device for automatically writing on the writing medium based on image information output from the first or second output device.