JP2003011585A - Partially erasing method for displaying recording surface of magnetic powder migration displaying sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic powder migration displaying sheet, which is light in weight, the whole surface erasion and the partial erasion of only a desired portion of characters, images or the like can be realized and the perfect erasion without ununiform erasion can be realized. SOLUTION: This partially erasing method of the displaying recording surface of the magnetic powder migration displaying sheet is formed by arranging a magnetic body on its front surface through a displaying sheet having a whole surface erasing means and a magnet on its rear surface under the condition that a record displayed on the magnetic powder migration displaying sheet is erased by shifting the magneto in interlocking with the shifting of the magnetic body. In Fig. 1, the magnetic powder migration displaying sheet I is so constituted as to arrange the magnetic body 5 on the side of a transparent film 1 as its displaying recording surface and the magnet 6 on its rear surface. When the magnetic body 5 is shifted into the characters desired to be erased in the displayingly recording surface, the magnet 6 on the rear surface is attracted by the magnetic force of the magnetic body 5. At that time, magnetic powder 20 is attracted by the magnet, resulting in shifting the magnetic powder 20 its lower part and consequently erasing the characters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet. More specifically, the present invention is capable of erasing only the recording of a desired portion of the display surface and erasing unevenness. The present invention relates to a method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet which is completely erased without any trouble.

[0002]

2. Description of the Related Art Conventionally, a predetermined amount of microcapsules containing a dispersion liquid in which magnetic powder and a white pigment such as titanium oxide are dispersed is mixed with a binder and uniformly coated on a transparent plastic sheet to a thickness of about 500 to 1000 μm. Magnetic powder electrophoretic display sheet or magnetic powder electrophoretic display sheet that contains a dispersion of magnetic powder particles and titanium oxide in each chamber divided into a number of small chambers with honeycomb walls between two plastic sheets A plate is known, and characters or images are recorded on such a magnetic powder electrophoretic display sheet or a magnetophoretic display plate by recording by floating / settling of magnetic powder using a magnet pen or the like, and erasing the recording if necessary. Magnetic powder electrophoretic recording methods that can be written or erased are known. In such a magnetic powder migration recording method, the recorded characters and images are erased by applying an erasing multipolar magnet from the back surface and moving the magnet. As an erasing method, it is applied to a microcapsule magnetic powder electrophoretic display sheet, a magnetophoretic recording plate having a honeycomb structure, etc. regardless of the type of the magnetic powder electrophoretic recording display sheet.

[0003]

As described above, in such a magnetic powder electrophoretic display sheet, a magnetophoretic display plate or the like (hereinafter, also referred to as a magnetic powder electrophoretic recording display sheet, etc.), a magnet is provided on the display sheet surface. Characters, images, etc. recorded with a pen are completely erased by moving the erase multi-pole magnet applied from the back side, but when trying to partially erase desired characters, images, etc. In addition, the erasing multipolar magnet slides on the rails installed on both sides of the magnetic powder electrophoretic recording display sheet or the magnetophoretic display plate to move the display sheet surface by sliding on the rails. Since the structure is such that the record recorded on the entire surface of the display sheet is erased, there is a problem that only the record desired to be erased cannot be erased.

Therefore, the present inventor and others have a problem in such a point, and the erasing multipolar magnet is straddled over the rails installed on both sides of the magnetic powder migration recording display sheet or the magnetophoretic display plate. In a structure in which the display sheet surface is moved by sliding on the rails, various studies have been conducted on methods of partially erasing desired characters and images while having a function of erasing the entire surface. Apply a magnetic material to the back surface of the electrophoretic recording display sheet, etc., and to the surface corresponding to the back surface magnet, and move the magnetic material on the front side along with the characters to be erased, etc. The present invention has been made based on the finding that the above can be eliminated. Therefore, the first problem to be solved by the present invention is to erase not only all the characters and images recorded on the surface of the display sheet but also only the desired portion, and to completely erase without erasing unevenness. Another object of the present invention is to provide a method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet.
A second problem to be solved by the present invention is that it is light in weight, can reduce frictional resistance, has good operability, and of course erases all characters and images recorded on the surface of a display sheet. Another object of the present invention is to provide a method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet in which only a desired portion can be erased, and the erase can be completely performed without erasure unevenness.

[0005]

The above-mentioned problems of the present invention are as follows.
The present invention can be achieved by the following inventions.

(1) A partial erasing method for a display recording surface of a magnetic powder electrophoretic display sheet, in which a magnetic material is arranged on the front surface and a magnet is arranged on the rear surface through a display sheet having an entire surface erasing means. A method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet, wherein a magnet is moved in association with the movement of the magnetic material to erase the record displayed on the magnetic powder electrophoretic display sheet. (2) The method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet according to the above item 1, wherein a magnet having a magnetic force weaker than that of the magnet disposed on the back surface is used as the magnetic body. (3) The method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet according to the above item 1 or 2, wherein the shape of the magnet on the back side is lightened. (4) The display recording surface of the magnetic powder electrophoretic display sheet according to any one of the above items 1 to 3, wherein when the partial erasing means composed of a combination of a magnetic body and a magnet is not used, the partial erasing means can be stored in the storage portion. Partial erasing method.

In the method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet of the present invention, the magnetic substance is formed by arranging the magnetic material on the front surface and the magnet on the back surface through the display sheet having the entire surface erasing means. A method for partially erasing a display recording surface of a powder electrophoretic display sheet, characterized in that a magnet is moved in association with the movement of the magnetic substance to erase the record displayed on the magnetic powder electrophoretic display sheet. With this erasing method, only the desired portion of the display sheet surface such as characters and images can be erased, and the erasing can be completed completely without erasing unevenness.

The invention of the method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet according to the second aspect is the invention according to the first aspect, in which a magnet having a weaker magnetic force than the magnet disposed on the back surface is used as the magnetic body. By using it, erasing is possible as in the case of a magnetic material. The invention of the method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet according to the third aspect is the invention according to the first or second aspect, wherein the shape of the magnet on the back side is lightened. In addition, the weight is reduced, the frictional resistance is reduced, and the operability is excellent. Further, in the invention of the method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet according to the fourth aspect, in the inventions according to the first to third aspects, the partial erasing means including a combination of a magnetic body and a magnet is not used. Sometimes, it can be stored in the storage unit, so that it does not interfere with recording by the magnetic pen.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings, but these are examples of the present invention and do not limit the present invention.

FIG. 1 is a partial sectional view of a magnetic powder migration recording display sheet of the present invention, particularly a microcapsule magnetic powder migration recording display sheet. FIG. 2 is a partial cross-sectional view of the microcapsule magnetic powder electrophoretic display sheet for explaining a method of partially erasing the display recording surface of the magnetic powder electrophoretic display sheet of the present invention. FIG. 3 is a partial perspective view showing the state of FIG. FIG. 3 is a cross-sectional view showing that the magnetic substance or magnet on the front surface side drags and moves. In FIG. 1, a microcapsule magnetic powder migration recording display sheet I is prepared by dispersing magnetic powder-containing microcapsules on a sheet 1 made of a transparent film in a binder and applying and drying the dispersion to form a microcapsule layer 3. Then, attach the backside film on top of this. On the microcapsule magnetic powder migration recording display sheet I thus obtained, the characters 7 attracted to the transparent film side are displayed. The magnetic substance 5 is arranged on the front surface side (transparent film side) and the magnet 6 is arranged on the rear surface film side through the magnetic powder migration recording display sheet I.

2 and 3, when the magnetic body 5 is moved along the character or the like to be erased, the magnetic body 5 once sucks the magnetic powder 20 in the capsule 2 (upper or middle portion). The magnetic powders 20, 21 and 22 located in the lower part and the lower part as a whole), the magnetic body 5 on the upper surface and the magnet 6 on the lower surface
As a result of dragging the magnet 6 on the lower surface during this movement, the magnetic powder 2 can be partially erased by moving the magnetic powder 2 downward again by this dragged magnet 6.

A magnet can be used as the magnetic powder 5 on the front surface side, and in this case, it is preferable when the thickness of the microcapsule magnetophoretic display sheet I is large. A magnet having a stronger magnetic force than the magnet 5 on the front surface side is used, which has an effect that characters and the like can be erased well. Therefore, when using a thick magnetophoretic display sheet I, it is effective to use magnets for both the front surface side and the back surface side. On the other hand, when the thin magnetophoretic display sheet I is used, a magnetic substance such as iron can be sufficiently operated on the surface side. When using magnets on both the front and back sides, it is preferable to use magnets on the back side that are larger than those on the front side, and magnets on the back side are stronger. A magnet may be used. Further in the present invention,
The shape of the magnetic body or the magnet may be arbitrary, but since it is used on the front and back surfaces of the magnetophoretic display sheet, it is flat, and preferably triangular, square, polygonal, circular or elliptical. A rubber magnet or a plastic magnet can be used as the magnet on the back surface side, and the plastic magnet is particularly preferable because it is lightweight. Further, in the present invention, the magnet used on the back surface side may be in the shape of a donut, which makes it lightweight and reduces frictional resistance, which is preferable in operation.

FIG. 4 is a perspective view showing the structure of a microcapsule magnetic powder migration recording display sheet to which the method for partially erasing a display sheet according to the present invention is applied. In FIG. 4, the magnetic powder electrophoretic recording display sheet I has an entire surface erasing means, and the entire surface erasing means 7 completely erases characters and images on the display surface on the front side on the back side thereof. Eraser is used,
In this, the rod-shaped or plate-shaped multi-pole magnet 7 is arranged vertically to the longitudinal direction of the magnetic powder electrophoretic recording display sheet I, and is installed so as to reciprocate in the longitudinal direction. On the other hand, the magnetic body 5 and the magnet 6 are arranged on both front and back surfaces. FIG. 5 is a partial plan view showing a magnetic powder migration recording display sheet having a storage portion in which the partial erasing means is stored. As shown in FIG. 5, the magnet 5 composed of these partial erasing means,
When not in use, 6 is a storage section provided at the corner of the frame section 10 of the magnetic powder electrophoretic recording display sheet I (for example,
It's like a yacht harbor that keeps ships moored. ) 9 is stored. As a result, the partial erasing means is not left on the display recording surface, so that recording by the magnetic pen is not hindered. The shape of the storage portion 9 is not particularly limited, and may be any shape such as a recess, a circle, an ellipse, a square, and a polygon. Further, the place where the storage portion 9 is provided is arbitrary and is not limited to the corner. In the present invention, in the partial erasing devices 5 and 6 and the full erasing device 7 which are arranged on both front and back sides and are made of magnetic material and magnets, the partial erasing magnet 6 and the full erasing magnet 7 arranged on the back side are , Both sides will not stick by setting either the front or back side in a repulsive form.

In the magnetic powder electrophoretic recording display sheet I thus constructed, first, the entire surface erasing device 7 is used to reciprocate on the back surface of the magnetic powder electrophoretic recording display sheet I to erase characters, images and the like 21 on the display surface. After erasing the entire surface by moving the magnetic powder 20 to the back surface side to form the magnetic powder 22,
A magnetic pen (not shown) is used to write characters and move the magnetic powder 20 to the surface side. At this time, when it is desired to erase a part of the written character 21, the magnetic body 5 of the partial erasing device is arranged on the character string to be erased, and when moved along the character string, the magnet 6 arranged on the back side is used. The magnetic powder 21 is sucked and moved to the lower part, so that characters and the like are erased. The magnetic powder electrophoretic recording display sheet or the magnetic powder electrophoretic recording display plate used in the method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet of the present invention includes a microcapsule magnetic powder electrophoretic recording display sheet and a honeycomb type magnetophoretic display plate. Etc. Therefore, these normal uses are toys, displays,
It goes without saying that it can be used for other purposes such as a blackboard.

[0015]

According to the method of partially erasing the display recording surface of the magnetic powder electrophoretic display sheet of the present invention, the magnetic material is arranged on the front surface and the magnet is arranged on the back surface through the display sheet having the entire surface erasing means. A method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet, comprising: erasing a record displayed on the magnetic powder electrophoretic display sheet by moving a magnet in conjunction with movement of the magnetic body. By doing so, it is possible to erase only the recording of a desired portion of the surface of the display sheet such as characters and images, and there is a particularly remarkable effect that it is completely erased without uneven erasure.

In the invention of the method for partially erasing the display body of the magnetophoretic display sheet according to the second aspect, in the invention according to the first aspect, a magnet having a weaker magnetic force than the magnet arranged on the back surface is used as the magnetic body. Thus, when the magnetophoretic display sheet is thick, it can be erased well. The invention of the method for partially erasing the display member of the magnetophoretic display sheet according to the third aspect,
In the invention described in the first item or the second item, since the shape of the magnet on the back surface side is lightened, the magnet becomes light in weight, the frictional resistance can be reduced, and the operability becomes excellent. Further, in the invention of the method for partially erasing the display recording surface of the magnetic powder electrophoretic display sheet according to the fourth aspect, in the inventions according to the first to third aspects, the partial erasing means including a combination of a magnetic body and a magnet is not used. Sometimes, it can be stored in the storage unit, so that it does not interfere with recording by the magnetic pen.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a magnetophoretic display sheet used in the present invention.

FIG. 2 is a partial cross-sectional view showing that characters on a magnetic powder electrophoretic recording display sheet used in the present invention are erased.

FIG. 3 is a cross-sectional view showing the relationship between magnetic lines of force of the partial erase device used in the present invention.

FIG. 4 is a perspective view showing the structure of a magnetic powder migration recording display sheet used in the present invention.

FIG. 5 is a partial plan view showing a magnetic powder migration recording display sheet having a storage unit in which a partial erasing device is stored.

[Explanation of symbols]

1 transparent film 2 microcapsules 3 microcapsule layer 4 Back film or back sheet 5 Magnetic substance or magnetic powder 6 magnets 7 Plate magnet (entire erasing device) 8 lines of magnetic force 9 Storage 10 frames 20 magnetic powder 21 Characters and images 22 Erase state of display surface I Magnetic powder migration record display sheet

Claims (4)

[Claims] 1. A method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet, wherein a magnetic material is arranged on the front surface and a magnet is arranged on the rear surface through a display sheet having a whole surface erasing means, A method of partially erasing a display recording surface of a magnetic powder electrophoretic display sheet, wherein a magnet is moved in association with the movement of the magnetic material to erase the record displayed on the magnetic powder electrophoretic display sheet. 2. The partial erasing method for the display recording surface of the magnetic powder electrophoretic display sheet according to claim 1, wherein a magnet having a magnetic force weaker than that of the magnet arranged on the back surface is used as the magnetic body. 3. The partial erasing method for the display recording surface of the magnetic powder electrophoretic display sheet according to claim 1, wherein the shape of the magnet on the back side is lightened. 4. The display record of the magnetic powder electrophoretic display sheet according to claim 1, wherein when the partial erasing means composed of a combination of a magnetic material and a magnet is not used, it can be stored in the storage portion. How to partially erase the surface.