JPS62254169A - Plate-writing recording device - Google Patents

Abstract

PURPOSE:To read both images on a recording medium and a writing medium without defocusing nor position shifting by moving the writing medium faster than the recording medium until the front ends of the images on the recording medium and writing medium reach read positions in reading operation. CONSTITUTION:When the images on the recording medium 1 and writing medium 16 are read, the writing medium 16 is moved faster than the recording medium 1 until the front ends of the images and writing medium 16 reach the read positions. Namely, the writing medium 16 moves by distance l' from A-C' during the image reading operation while the recording medium 1 moves by distance (l) from A-C. For the purpose, the moving speed v' of the writing medium 16 is made faster than the moving speed (v) of the recording medium 1 to equalize the time (t) up to the arrival at the read positions C and C'.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is capable of displaying an image of a manuscript or the like on a blackboard-like surface,
The present invention also relates to a board writing device that allows a desired image to be written over a displayed image.

(Prior Art) Conventionally, as this type of board recording device, the following have been proposed. This is as shown in Figure 3.
An endless belt-shaped recording medium 102 is wound between a pair of rollers 100 and 101, and an image forming means 103 is provided at a position facing one of the rollers 101. This image forming means 103 is disclosed in Japanese Patent Publication No. 51-46707, etc., and forms an image by depositing toner on the recording medium 102 according to image information as described in 1. Further, on the outer circumferential side of the recording medium 102, there is arranged a writing medium 104 that is transparent in the form of an endless belt and can be written on with a felt pen 114 or the like. Rollers 106, 107° 108 move overlappingly with the medium 102.
is wrapped around. ”1 Recording medium 102 or writing medium 1
The characters, figures, etc. recorded in 04 are illuminated by a lamp 110 with a reflective shade 109.

The reflected light image is read by a photoelectric conversion element 113 via a mirror 111 and a lens 112, and is recorded by a printer or the like.

(Problems to be Solved by the Invention) However, such prior art has the following problems. That is, when reading images on the recording medium 102 and the writing medium 104, there is a large gap BB' between the recording medium 102 and the writing medium 104 at the position illuminated by the lamp LLO, that is, at the reading position. Therefore, when condensing both images with the lens 112, there is a problem that the focus is shifted and proper images cannot be read.

Furthermore, when moving the image on the display unit 105 to the reading position,
Since the recording medium 102 and the writing medium 104 are moved at the same speed, the recording medium 102 moves the distance of the sentence from A to B, whereas the writing medium 104 moves the distance of the sentence from A' to B'. Moving. Therefore, while moving the recording medium 102 and the writing medium 104 to the reading position, a sentence '-sentence misalignment occurs between them, making it impossible to faithfully read and print the image information displayed on the display unit 105. There was a problem.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to be able to read images of recording media and writing media without shifting their focus and position from each other. The object of the present invention is to provide a blackboard recording device with the following features.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an endless belt-shaped recording medium and a means for forming an image by attaching a colored substance to the recording medium according to image information. and means for movably supporting the recording medium in a planar manner in a display section;
a transparent and writable endless belt-shaped writing medium disposed on the outer circumferential side of the recording medium; a means for supporting the writing medium in a planar manner on a display section so as to be movable in the same direction as the recording medium; In the board recording device having the recording medium and a means for reading images on the writing medium, the images of the recording medium and the writing medium are read at the closest positions of the two, and when reading, the leading edges of the images of the recording medium and the writing medium are The writing medium is configured to move faster than the recording medium until it reaches the reading position.

(Function) In the present invention, by reading the images of both the recording medium and the writing medium at the closest position, the images of the recording medium and the writing medium will not be out of focus. The moving speed of the writing medium is increased so that the leading edges of the images of the recording medium and the writing medium reach the reading position at the same time, and then the image is read.

(Example) The present invention will be explained below based on illustrated embodiments.

FIG. 1 shows an embodiment of a board recording device according to the present invention. l is a recording medium formed in the shape of an endless belt,
The recording medium l is wound around a pair of rollers 2 and 3 that are arranged vertically opposite to each other, and the recording medium l is wrapped around a pair of rollers 2 and 3 that
It is movably supported in a planar manner. This recording medium 1 is driven in the direction of the arrow during image formation. The lowest position of the circulation path of the recording medium l, that is, the roller 3
A means 6 for forming one image by depositing toner 9 as a colored substance on the recording medium l according to image information is disposed at a position facing the recording medium l.

In the figure, 5 is a toner container containing toner 9.

The image forming means 6 employs a so-called magnetic stylus system known from Japanese Patent Publication No. 51-46707 and the like. That is, as shown in FIG. 3, the principle is that a cylindrical magnet 8 is rotated within a non-magnetic cylinder 7, and a conductive magnetic toner 9 colored black or the like is conveyed through the non-magnetic cylinder 7''. Then, it passes over needle-like recording electrodes IO made of magnetic material that are densely arranged along the axial direction on the non-magnetic cylinder 7.

Thus, a voltage is applied between the recording electrode 10 and the conductive layer 12 of the recording medium 1, which is composed of the insulating layer 11 on the front side and the conductive layer 12 on the back side, and only the portion to which the voltage is applied is recorded. An image is formed by attaching toner 9 to a medium 1.

Image information to be displayed is input from the document reading device 13, and electrical signals are sent to the recording electrodes 10 from the encoding/decoding circuit section 28 and the storage device 14 or directly from the encoding/decoding circuit section 28 by the recording control section 15. is applied as .

Further, on the outer circumferential side of the -1- writing recording medium l, a writing medium 16 formed in the shape of an endless belt, transparent and capable of writing and erasing with a felt pen or the like is disposed, and the writing medium 16 is It is wound around rollers 17, 18 and 19 so as to be able to circulate. Further, this writing medium 16 is supported in a planar manner by rollers 17 and 18 in the display section 4.

Further, near the roller 3, there is a roller for removing the image on the recording medium l and the toner adhering to the back surface of the writing medium 16.
A cleaning member 20 is provided. The cleaning member 20 removes toner by moving toner spikes formed on the outer periphery of a cylindrical member by magnetic attraction in a brush shape that rotates once. Further, below the roller 20, an erasing member 21 for erasing an image written on the writing medium 161 is provided.

Furthermore, means 22 for reading images on the recording medium 1 and the writing medium 16 is provided on the back side of the recording medium 1. That is, at the reading position that is the closest position between the recording medium 1 and the writing medium 16, there is a lamp 24 with a reflective shade 23 that illuminates the images on both the media 1 and 16, and a light image reflected from both the media 1 and 16. A mirror 27 is provided to make the light incident on the photoelectric conversion element 26 via the lens 25. The images on the recording medium 1 and the writing medium 16 are read by the photoelectric conversion element 26 and recorded by the printer 29 directly via the encoding/decoding circuit section 28 or via the storage device 14.

In this embodiment, 1. When reading an image, until the leading edge of the image on the recording medium l and the writing medium 16 reaches the reading position,
The writing medium 16 is configured to move faster than the recording medium 1. In other words, when reading an image,
The recording medium l moves a distance of a sentence from A to C, while the writing medium 16 moves a distance of an intersection from A to C'.

Therefore, the moving speed V' of the writing medium 16 is made faster than the moving speed V' of the recording medium 1, and the times t required to reach the reading positions C and C' are made equal. That is, as shown, the recording medium 1 and the writing medium 16 are moved by a driving means (not shown).

In the figure, 30 indicates a support plate, and 31 indicates the main body of the apparatus.

In the above configuration, in the board recording apparatus according to this embodiment, image display, addition, etc. are performed in the following manner.

That is, while moving the recording medium l at a predetermined speed, a voltage corresponding to image information is applied between the recording electrode lO and the conductive layer 12 of the recording medium l, and toner 9 is applied to the surface of the recording medium l.
is attached, an image is displayed, and the image is stopped on the display section 4. Therefore, the image displayed on the recording medium 1 can be viewed even from a distance through the transparent writing medium 16, and if necessary, in addition to this displayed image, the image displayed on the recording medium 1 can be displayed on the writing medium 16- with a felt-tip pen or the like. You can add letters, figures, etc.

Next, in order to read the image of "recording medium l and writing medium 16", the writing medium 16 is moved at a speed V' faster than the moving speed V of the recording medium 1. By doing this,
The leading edges of the images on the recording medium 1 and the writing medium 16 reach the reading position at the same time, and then by moving the recording medium 1 and the writing medium 16 at the same speed, the images on both media 1.16 can be read without shifting from each other. It can be read in a focused state at the closest positions c and c'.

In the above embodiment, the case where an image is displayed on a recording medium by the so-called magnetic stylus method has been described.
Similarly to the above, a combination of electrophotography and an optical scanning device, electrostatic recording, etc. may be used.

(Effects of the Invention) The present invention has the above-described configuration and operation, and can read images on a recording medium and a writing medium without shifting their focus and position from each other.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a board writing device according to the present invention, FIG. 2 is an explanatory diagram showing the image forming principle of the same device, and FIG. 3 is a block diagram showing a conventional board writing device. . Explanation of symbols■...Recording medium 2.3...Roller 4...
-Display section 9...Toner 6...Image forming means 16...Writing medium 17.18.19...
roller

Claims (1)

[Claims] an endless belt-shaped recording medium; means for forming an image by depositing a colored substance on the recording medium according to image information; means for movably supporting the recording medium in a planar manner in a display section; a transparent and writable endless belt-shaped writing medium disposed on the outer circumferential side of the recording medium; means for supporting the writing medium in a planar manner in a display section so as to be movable in the same direction as the recording medium; In a board recording device having a recording medium and a means for reading an image on the writing medium, the images of the recording medium and the writing medium are read at a position closest to the writing medium, and the leading edges of the images of the recording medium and the writing medium are read at the time of reading. A board writing recording device characterized in that the writing medium moves faster than the recording medium until it reaches a position.