Microcapsule magnetophoretic display system

Abstract

To achieve a magnetic erasing tool that can erase an erasure target within an accurate range, a magnetic erasing tool enlarging a freedom degree of a size of the magnetic erasing tool adapted to a microcapsule magnetophoresis display size, and combines the magnetic erasing tool having the freedom degree thereof enlarged and a magnetic writing instrument.SOLUTION: A magnetic erasing tool for scanning a recording surface of a microcapsule magnetophoresis display, and erasing a magnetic recording display body displayed on the microcapsule magnetophoresis display is configured to: use a multipolar magnetization rubber magnet 2 as erasure means; set one surface of the multipolar magnetization rubber magnet 2 as an erasing surface side 3 scanning the recording surface of the microcapsule magnetophoresis display to erase the magnetic recording display body displayed on the recording surface; and control density of magnetic force lines coming from the erasing surface side 3 to be magnetic force suitable for aggregating a magnetic particle within a microcapsule to a center of the microcapsule.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a microcapsule magnetophoretic display system including a magnetic erasing tool for scanning the recording surface of a microcapsule magnetophoretic display and erasing the magnetically recorded display of black characters or images by applying a magnetic field to the microcapsule magnetophoretic display, and a magnetic writing tool for writing the black characters or images by applying a magnetic field to the microcapsule magnetophoretic display. [Background technology]

[0002] Patent document 1 discloses a magnetic eraser that rotates a magnet inside a housing, as a magnetic eraser that applies a magnetic field to a microcapsule magnetophoretic display to erase the displayed black characters or images on the magnetic recording display from the surface side of the recording surface.

[0003] Patent Document 2 discloses a magnetic erasing tool in which a magnet and a magnetic body are arranged in a housing, and the magnetic body controls the strength and direction of the magnetic field lines from the magnet.

[0004] Patent Document 3 discloses a magnetic erasing tool that rotates a magnet, similar to Patent Document 1, and a magnetic erasing tool that arranges multiple magnets in a housing to control the direction of magnetic lines of force. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6213886 [Patent Document 2] Patent No. 6835383 [Patent Document 3] Japanese Patent Publication No. 2022-178567 Summary of the Invention [Problem to be solved by the invention]

[0006] In Patent Document 1, the direction of the magnetic field lines is continuously rotated by rotating a magnet at a constant speed, and the magnetic particles inside the microcapsules of the microcapsule magnetophoretic display rotate and aggregate in response, allowing the black magnetic particles to gather near the center of the microcapsules, resulting in excellent erasing performance.However, a driving member is required to rotate the magnet, which increases the weight and cost of the magnetic erasing device, and if the motor is driven by a battery, the microcapsule magnetophoretic display system combined with this magnetic erasing device cannot be considered a 100% eco-friendly product.

[0007] In Patent Document 2, the strength and direction of the magnetic lines are controlled by arranging a magnetic body without rotating the magnet, so although it is lighter, less expensive, and more eco-friendly than the magnetic eraser in Patent Document 1, its erasing performance is inferior to that of the magnetic eraser in Patent Document 1.

[0008] Furthermore, the magnetic erasure tool of Patent Document 2 has a problem in that the magnets and magnetic materials are arranged in the internal space of the housing structure, which reduces the degree of freedom in the size of the magnetic erasure tool.

[0009] In order to improve the erasure performance of the magnetic erasure tool of Patent Document 2, Patent Document 3 aims to achieve the same erasure performance as Patent Document 1 without rotating the magnets by arranging multiple magnets within a housing perpendicular to the scanning direction of the magnetic erasure tool, so that when the magnetic erasure tool is scanned, the south and north poles alternate, but when multiple magnets are arranged side by side within a housing, the direction, strength, and reach of the magnetic field lines generated by the magnets differ significantly between the areas where the magnets are adjacent and the ends where there are no adjacent magnets, so it is necessary to control the strength and direction of the magnetic field lines by arranging a magnetic material, as in Patent Document 2. Therefore, the latter magnetic erasure tool of Patent Document 3 requires the arrangement of a magnetic material in addition to the use of multiple magnets, which not only increases the weight and cost of the magnetic erasure tool, but also significantly limits the flexibility in the shape and size of the magnetic erasure tool.

[0010] The magnetic erasure tools in Patent Documents 1 to 3 use permanent magnets, and even if a magnetic body is placed to control the strength and direction of the magnetic lines, the magnetic lines extend over a wide area, making it difficult to erase the target area in the case of partial erasure.

[0011] The present inventors have conducted extensive research and testing to solve these problems, and have come to the conclusion that a multi-pole magnetized rubber magnet can be used as the magnet for the magnetic erasure tool.

[0012] Multi-pole magnetized rubber magnets are used in many products and are distributed under names such as rubber magnets, magnetic sheets, plastic magnets, and magnetic belts. There are different types of multi-pole magnetized rubber magnets, including isotropic and anisotropic, and they differ in thickness and magnetization pitch (the distance between the south and north poles). Generally, anisotropic magnets are stronger than isotropic magnets, and the thicker the magnetization pitch, the stronger the magnetic force, and the range of influence of the magnetic field lines changes depending on the magnetization pitch. Because the magnetic field lines emerge from adjacent north poles and enter the south pole, the density of the magnetic field lines does not decrease even at distances from the multi-pole magnetized rubber magnet as the magnetization pitch widens in proportion to the magnetization pitch.

[0013] When the recording surface of a microcapsule magnetophoretic display is scanned with the magnetization direction of a multi-polar magnetized rubber magnet perpendicular to the direction of travel, the magnetic particles inside the microcapsules form needle-like rows along the magnetic field lines, and rotate as the south and north poles pass by alternately. After the multi-polar magnetized rubber magnet has passed, the magnetic particles inside the microcapsules aggregate due to residual magnetization.

[0014] As a result of test research, it was discovered that when a multi-pole magnetized rubber magnet is scanned along the recording surface of a microcapsule magnetic phoretic display, if the magnetic force of the multi-pole magnetized rubber magnet is strong, the magnetic particles inside the microcapsules rotate but are attracted by the magnetic force and agglomerate near the surface of the display, resulting in a black recording surface; however, if the magnetic force is weak, the magnetic particles inside the microcapsules are not attracted by the magnetic force, and the recording surface of the display becomes white.

[0015] As a result, we discovered that by controlling the magnetic force of the multi-pole magnetized rubber magnet to a magnetic force that causes the magnetic particles in the microcapsules to aggregate near the center of the microcapsules, it is possible to apply a magnetic field to the microcapsule magnetophoretic display and erase the displayed magnetic recording display of black letters or images, which led to the creation of this invention.

[0016] The object of the present invention is to provide a magnetic erasing tool that can erase the erasure target within a precise range, and that maintains excellent erasing performance, light weight, and eco-friendliness while achieving further cost reduction and increasing the degree of freedom in size of the magnetic erasing tool to match the size of a microcapsule magnetic phoretic display, as well as to provide a microcapsule magnetic phoretic display system that combines this magnetic erasing tool with a magnetic writing tool. [Means for solving the problem]

[0017] In order to achieve the above object, the invention described in claim 1 is: A microcapsule magnetophoretic display and a magnetic writing instrument, A magnetic erasing tool for scanning the recording surface of a microcapsule magnetophoretic display to apply a magnetic field to the microcapsule magnetophoretic display and erase the magnetically recorded display of black characters or images displayed on the display. A microcapsule magnetophoretic display system comprising: The erasing means is a multi-pole magnetized rubber magnet, one side of which is set as an erasing surface that scans the recording surface of the microcapsule magnetic phoretic display to erase the magnetic recording display displayed on the recording surface, and the density of the magnetic lines of force emanating from the erasing surface is controlled to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

[0018] According to the invention described in claim 1, The magnetic eraser hasA multi-pole magnetized rubber magnet is used as the erasing means, and one side of the multi-pole magnetized rubber magnet is set as the erasing surface side that scans the recording surface of the microcapsule magnetic phoretic display to erase the magnetic recording display displayed on the recording surface, and the density of the magnetic field lines emitted from the erasing surface side is controlled to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, when the erasing surface side set on the multi-pole magnetized rubber magnet is used to scan the recording surface of the microcapsule magnetic phoretic display, the magnetic particles in the microcapsules after the multi-pole magnetized rubber magnet has passed are caused to agglomerate near the center of the microcapsules due to residual magnetization, and the recording surface turns white, erasing the magnetic recording display of black letters or images displayed on the recording surface.

[0019] In addition, a multi-pole magnetized rubber magnet is used as the erasing means, which allows for light weight and eco-friendliness while further reducing costs and making it suitable for the size of a microcapsule magnetic migration display. The aforementioned Expanded the flexibility of the size of the magnetic eraser The aforementioned A magnetic eraser can be obtained.

[0020] The invention described in claim 2 is characterized in that the magnetized surface of the multi-pole magnetized rubber magnet described in claim 1 is the erasing surface side, and a spacer layer made of a non-magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0021] According to the invention described in claim 2, the magnetized surface of the multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of a non-magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, the spacer layer made of a non-magnetic material lowers the density of the magnetic lines of force emanating from the erasing surface side, and by simply changing the thickness of the spacer layer, the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0022] The invention described in claim 3 is characterized in that the magnetized surface of the multi-pole magnetized rubber magnet described in claim 1 is the erasing surface side, and a spacer layer made of magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0023] According to the invention described in claim 3, the magnetized surface of the multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, the density of the magnetic lines of force emanating from the erasing surface side is lowered by the magnetic lines passing through the spacer layer made of magnetic material, and by the simple means of changing the thickness of the spacer layer, the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0024] The invention described in claim 4 is characterized in that the magnetized surface of the multi-pole magnetized rubber magnet described in claim 1 is the erasing surface side, and a spacer layer made of magnetic material and non-magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force coming from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0025] According to the invention described in claim 4, a spacer layer made of magnetic and non-magnetic materials is provided on the erasing surface side of the multi-pole magnetized rubber magnet as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, by controlling the thickness of each spacer layer made of magnetic and non-magnetic materials, the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0026] The invention described in claim 5 is characterized in that the multi-pole magnetized rubber magnet described in claim 1 is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and the thickness of the single-sided multi-pole magnetized rubber magnet being selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0027] According to the invention described in claim 5, the multi-pole magnetized rubber magnet is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and the thickness of the single-sided multi-pole magnetized rubber magnet is selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, by simply selecting and setting the thickness of the single-sided multi-pole magnetized rubber magnet, the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0028] The invention described in claim 6 is characterized in that the multi-pole magnetized rubber magnet described in claim 1 is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and the magnetization pitch of the single-sided multi-pole magnetized rubber magnet being selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0029] According to the invention described in claim 6, the multi-pole magnetized rubber magnet is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and the magnetization pitch of the single-sided multi-pole magnetized rubber magnet is selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, the density of the magnetic lines of force can be adjusted by the simple means of selecting the magnetization pitch of the single-sided multi-pole magnetized rubber magnet, and the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0030] The invention described in claim 7 is characterized in that the multi-pole magnetized rubber magnet described in claim 1 is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and a spacer layer made of a non-magnetic material being provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0031] According to the invention described in claim 7, the non-magnetized surface of the single-sided multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of a non-magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, the spacer layer made of a non-magnetic material lowers the density of the magnetic lines of force emanating from the erasing surface side, and by simply changing the thickness of the spacer layer, the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0032] The invention described in claim 8 is characterized in that the multi-pole magnetized rubber magnet described in claim 1 is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and a spacer layer made of magnetic material being provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0033] According to the invention described in claim 8, the non-magnetized surface of the single-sided multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic field lines emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, the density of the magnetic field lines emanating from the erasing surface side is lowered by the magnetic field lines passing through the spacer layer made of magnetic material, and by the simple means of changing the thickness of the spacer layer, the density of the magnetic field lines emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0034] The invention described in claim 9 is characterized in that the multi-pole magnetized rubber magnet described in claim 1 is a single-sided multi-pole magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and a spacer layer made of magnetic and non-magnetic material being provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.

[0035] According to the invention described in claim 9, the non-magnetized surface of the single-sided multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of magnetic and non-magnetic materials is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules to the center of the microcapsules.Therefore, by controlling the thickness of each spacer layer made of magnetic and non-magnetic materials, the density of the magnetic lines of force emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules.

[0036] The invention described in claim 10 is characterized in that the multi-pole magnetized rubber magnet described in any one of claims 5 to 9 is a single-sided multi-pole magnetized rubber magnet, and a magnetic material is placed on the magnetized surface.

[0037] According to the invention described in claim 10, the multi-pole magnetized rubber magnet is a single-sided multi-pole magnetized rubber magnet, and a magnetic material is placed on the magnetized surface, so that when the magnetic force of the single-sided multi-pole magnetized rubber magnet is weak, the magnetic force emanating from the non-magnetized surface can be strengthened, and even when the magnetic force is strengthened, the density of the magnetic field lines emanating from the erasing surface side can be controlled to a magnetic force suitable for agglomerating the magnetic particles near the center of the microcapsules by controlling the thickness of the spacer layer. [Effects of the Invention]

[0044] As described above, the present invention According to the microcapsule magnetophoretic display system, Magnetic eraser As an erasing means By using a multi-pole magnetized rubber magnet, it is possible to erase the erasure target in an accurate range, simplify the structure of the magnetic erasure tool, reduce the number of components, and reduce costs.In addition, the freedom in the size of the magnetic erasure tool is increased, making it possible to provide a magnetic erasure tool that is suitable for the size and erasure area of the microcapsule magnetic phoretic display. [Brief explanation of the drawings]

[0045] [Figure 1] FIG. 1 is a cross-sectional explanatory diagram showing a first example of an embodiment of a microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the process of erasing a magnetic recording display by scanning the recording surface of the microcapsule magnetophoretic display using a magnetic erasing tool provided in the first example. [Figure 2] FIG. 2 is a cross-sectional explanatory diagram showing a second example of an embodiment of a microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the process of erasing a magnetic recording display by scanning the recording surface of the microcapsule magnetophoretic display using a magnetic erasing tool provided in the second example. [Figure 3] FIG. 3 is a cross-sectional explanatory diagram showing a third example of an embodiment of a microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the process of erasing a magnetic recording display by scanning the recording surface of the microcapsule magnetophoretic display using a magnetic erasing tool provided in the third example. [Figure 4]FIG. 4 is a cross-sectional explanatory diagram showing a fourth and fifth embodiment of the microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the manner in which the recording surface of the microcapsule magnetophoretic display is scanned using a magnetic erasing tool provided in the fourth and fifth embodiments, thereby erasing the magnetic recording display. [Figure 5] FIG. 6 is a cross-sectional explanatory diagram showing a sixth embodiment of the microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the manner in which the recording surface of the microcapsule magnetophoretic display is scanned using a magnetic erasing tool provided in the sixth embodiment, thereby erasing the magnetic recording display. [Figure 6] FIG. 7 is a cross-sectional explanatory diagram showing a seventh embodiment of the microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the magnetic erasure tool provided in the seventh embodiment being used to scan the recording surface of the microcapsule magnetophoretic display and erase the magnetic recording display. [Figure 7] FIG. 8 is an explanatory cross-sectional view showing an eighth example of an embodiment of a microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the process of erasing a magnetic recording display by scanning the recording surface of the microcapsule magnetophoretic display using a magnetic erasing tool provided in the eighth example. [Figure 8] FIG. 9 is a cross-sectional explanatory diagram showing a ninth embodiment of the microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the magnetic erasure tool provided in the ninth embodiment being used to scan the recording surface of the microcapsule magnetophoretic display and erase the magnetic recording display. [Figure 9] FIG. 20 is a perspective view showing a magnetic eraser provided in a fourteenth embodiment of the microcapsule magnetophoretic display system according to the present invention. [Figure 10] (A) and (B) are cross-sectional explanatory diagrams showing a 15th embodiment of the microcapsule magnetophoretic display system according to the present invention, and a schematic representation of the magnetic erasure tool provided in the 15th embodiment scanning the recording surface of the microcapsule magnetophoretic display and erasing the magnetic recording display. [Figure 11]1 is an explanatory diagram showing an example of the entire microcapsule magnetophoretic display system according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0046] The following is a description of the present invention. Ruma Although an embodiment of a microcapsule magnetophoretic display system will be described, the present invention is not limited thereto.

[0047] [Magnetic eraser] FIG. 1 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The first embodiment of the present invention and the first embodiment of the present invention Magnetic eraser for Using Tema FIG. 10 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned (in the direction of the arrow) to erase the magnetic recording display.

[0048] The first example of the magnetic eraser 1 scans the recording surface 102 of the microcapsule magnetophoretic display 101, applying a magnetic field to the microcapsule magnetophoretic display 101 and erasing the displayed magnetic recording display of black letters or images. A multi-pole magnetized rubber magnet 2 is used as the erasing means, and one side of the multi-pole magnetized rubber magnet 2 is set as the erasing surface side 3 that scans the recording surface 102 of the microcapsule magnetophoretic display 101 to erase the magnetic recording display displayed on the recording surface 102. The density of the magnetic field lines emanating from the erasing surface side 3 is controlled to a magnetic force suitable for agglomerating the magnetic particles 104 in the microcapsules 103 to the center of the microcapsules 103.

[0049] In the first example, the multi-polar magnetized rubber magnet 2 used as the erasing means is a single-sided multi-polar magnetized rubber magnet 2a, with the magnetized surface 4 serving as the erasing surface side 3.

[0050] A spacer layer 5a made of a non-magnetic material is provided on the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 in the microcapsules 103 to the center of the microcapsules 103.

[0051] By providing a spacer layer 5a made of a non-magnetic material on the erasing surface side 3 of the single-sided multi-polar magnetized rubber magnet 2a, the spacer layer 5a made of a non-magnetic material creates a space, which reduces the density of the magnetic lines of force emanating from the erasing surface side 3. The thickness of the spacer layer 5a made of a non-magnetic material is set to a thickness that can control the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0052] The spacer layer 5a made of a nonmagnetic material can be given other functions by selecting the material. For example, felt can be used to provide a scratch prevention function for the surface substrate 105 of the microcapsule magnetophoretic display 101, a silicone-treated surface material can provide a friction reduction function, or an anti-static material can provide an anti-static function. Furthermore, the spacer layer 5a made of a nonmagnetic material may be a frame only on the periphery, with a space in the center.

[0053] According to the first example of the magnetic eraser 1, a spacer layer 5a made of a non-magnetic material is provided on the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a, and the thickness of the spacer layer 5a made of a non-magnetic material is set to a thickness that can be controlled so that the density of the magnetic lines of force emanating from the erasing surface side 3 becomes a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.Therefore, by controlling the thickness of the spacer layer 5a made of a non-magnetic material, the density of the magnetic lines of force emanating from the erasing surface side 3 can be made a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0054] When the erasing surface side 3 of the single-sided multi-polar magnetized rubber magnet 2a of the magnetic eraser 1 is scanned over the recording surface 102 of the microcapsule magnetophoretic display 101, the magnetic particles 104 that had aggregated on the surface side of the microcapsules 103 and formed a magnetic recording display of black letters or images rotate within the microcapsules 103 due to the magnetic field lines emanating from the erasing surface side 3 as the single-sided multi-polar magnetized rubber magnet 2a passes, and after the single-sided multi-polar magnetized rubber magnet 2a has passed, the magnetic particles 104 are aggregated near the center of the microcapsules 103 due to residual magnetization, causing the recording surface 102 to turn white and erasing the magnetic recording display of black letters or images displayed on the recording surface 102 (see Figure 1).

[0055] In the first example, the multi-pole magnetized rubber magnet 2 used as the erasing means is a single-sided multi-pole magnetized rubber magnet 2a, but in the case of a double-sided multi-pole magnetized rubber magnet (not shown), the control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103 can be the same as in the first example.

[0056] FIG. 2 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The second example of the embodiment and the second example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0057] The magnetic erasing tool 1 of the second example is the same in basic configuration as the magnetic erasing tool 1 of the first example, and the same components as those of the first example will be described using the same reference numerals.

[0058] The difference between the magnetic eraser 1 of the second example and the first example is that in the second example, a spacer layer 5b made of magnetic material is provided on the erasing surface side 3 as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103.

[0059] By providing a spacer layer 5b made of a magnetic material on the erasing surface side 3 of the single-sided multi-polar magnetized rubber magnet 2a, not only does the spacer layer 5b made of magnetic material create a space, but the magnetic lines of force pass through the spacer layer 5b made of magnetic material, thereby lowering the density of the magnetic lines of force emanating from the erasing surface side 3. The thickness of the spacer layer 5b made of magnetic material is set to a thickness that can control the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0060] The spacer layer 5b made of a magnetic material is not particularly limited in material, and the lamination means may be a plate or foil that is attracted by magnetic force or attached with an adhesive or pressure-sensitive adhesive. In the case of a thin film, coating or vapor deposition may also be used.

[0061] According to the second example of the magnetic eraser 1, a spacer layer 5b made of a magnetic material is provided on the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a, and the thickness of the spacer layer 5b made of a magnetic material is set to a thickness that can be controlled so that the density of the magnetic lines of force emanating from the erasing surface side 3 becomes a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.Therefore, by controlling the thickness of the spacer layer 5b made of a magnetic material, the density of the magnetic lines of force emanating from the erasing surface side 3 can be made a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0062] Then, when the erasing surface side 3 of the single-sided multi-polar magnetized rubber magnet 2a of the magnetic eraser 1 is scanned over the recording surface 102 of the microcapsule magnetophoretic display 101, as in the first example, the magnetic particles 104 that had aggregated on the surface side of the microcapsule 103 and formed a magnetic recording display of black letters or images rotate within the microcapsule 103 due to the magnetic field lines emanating from the erasing surface side 3 as the single-sided multi-polar magnetized rubber magnet 2a passes, and after the single-sided multi-polar magnetized rubber magnet 2a has passed, the magnetic particles 104 are aggregated near the center of the microcapsule 103 due to residual magnetization, causing the recording surface 102 to turn white and erasing the magnetic recording display of black letters or images displayed on the recording surface 102 (see Figure 2).

[0063] In the second example, the multi-pole magnetized rubber magnet 2 used as the erasing means is a single-sided multi-pole magnetized rubber magnet 2a, but in the case of a double-sided multi-pole magnetized rubber magnet (not shown), the control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103 can be the same as in the second example.

[0064] FIG. 3 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The third example of the embodiment and the third example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0065] The magnetic erasing tool 1 of the third example has the same basic configuration as the magnetic erasing tool 1 of the first and second examples, and the same components as those of the first and second examples will be described using the same reference numerals.

[0066] The difference between the magnetic eraser 1 of the third example and the first and second examples is that in the third example, a spacer layer 5b made of a magnetic material and a spacer layer 5a made of a non-magnetic material are provided on the erasing surface side 3 as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103.

[0067] By providing a spacer layer 5b made of a magnetic material and a spacer layer 5a made of a non-magnetic material on the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a, the spacer layer 5b made of a magnetic material and the spacer layer 5a made of a non-magnetic material form a space, and the magnetic lines of force pass through the spacer layer 5b made of a magnetic material, thereby reducing the density of the magnetic lines of force emerging from the erasing surface side 3.

[0068] The thickness of the spacer layer 5b made of magnetic material and the spacer layer 5a made of non-magnetic material is set to a thickness that can control the density of the magnetic lines of force emanating from the erasure surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0069] The materials of the spacer layer 5b made of a magnetic material and the spacer layer 5a made of a non-magnetic material are the same as those in the first and second examples.

[0070] According to the third example of the magnetic eraser 1, a spacer layer 5b made of a magnetic material and a spacer layer 5a made of a non-magnetic material are provided on the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a, and the thicknesses of the spacer layer 5b made of a magnetic material and the spacer layer 5a made of a non-magnetic material are set to thicknesses that can control the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.Therefore, by controlling the thicknesses of the spacer layer 5b made of a magnetic material and the spacer layer 5a made of a non-magnetic material, the density of the magnetic lines of force emanating from the erasing surface side 4 can be made to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0071] When the recording surface 102 of the microcapsule magnetophoretic display 101 is scanned with the erasing surface side 3 of the single-sided multi-polar magnetized rubber magnet 2a of the magnetic eraser 1, as in the first and second examples, the magnetic particles 104 that had aggregated on the surface side of the microcapsule 103 and formed a magnetic recording display of black letters or images rotate within the microcapsule 103 due to the magnetic field lines emanating from the erasing surface side 3 as the single-sided multi-polar magnetized rubber magnet 2a passes, and after the single-sided multi-polar magnetized rubber magnet 2a has passed, the magnetic particles 104 are aggregated near the center of the microcapsule 103 due to residual magnetization, causing the recording surface 102 to turn white and erasing the magnetic recording display of black letters or images displayed on the recording surface 102 (see Figure 3).

[0072] In the third example, the multi-pole magnetized rubber magnet 2 used as the erasing means is a single-sided multi-pole magnetized rubber magnet 2a, but in the case of a double-sided multi-pole magnetized rubber magnet (not shown), the control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103 can be the same as in the third example.

[0073] FIG. 4 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The fourth example of the embodiment of the fourth example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0074] The magnetic erasing tool 1 of the fourth example is the same in basic configuration as the magnetic erasing tool 1 of the first example, and the same components as those of the first example will be described using the same reference numerals.

[0075] The difference between the magnetic eraser 1 of the fourth example and the first example is that the non-magnetized surface 6 of the single-sided multi-polar magnetized rubber magnet 2a is the erasing surface side 3, and the thickness of the single-sided multi-polar magnetized rubber magnet 2a is selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103.

[0076] In the fourth example, the thickness of the single-sided multi-pole magnetized rubber magnet 2a is selected to be a thickness suitable for the density of the magnetic lines of force emanating from the erasing surface side 3 to aggregate the magnetic particles 104 near the center of the microcapsules 103, with the thickness of the surface substrate 105 of the microcapsule magnetic phoretic display 101 as the space.

[0077] When the non-magnetized surface 6 of the single-sided multi-polar magnetized rubber magnet 2a is used as the erasing surface 3, the non-magnetized surface 6 of the single-sided multi-polar magnetized rubber magnet 2a itself serves as the spacer layer 5b made of magnetic material in the second example, and the surface substrate 105 of the microcapsule magnetophoretic display 101 serves as the spacer layer 5a made of non-magnetic material in the first example, so that the magnetic eraser 1 can be made simply by selecting the thickness of the single-sided multi-polar magnetized rubber magnet 2a.

[0078] Then, by scanning the recording surface 102 of the microcapsule magnetophoretic display 101 with the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a of the magnetic eraser 1, the magnetic recording display of black letters or images displayed on the recording surface 102 can be erased, as in the first example (see Figure 4).

[0079] FIG. 4 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system This shows a fifth example along with a fourth example of the embodiment.

[0080] The magnetic erasing tool 1 of the fifth example is basically the same as the magnetic erasing tool 1 of the fourth example, and the same components as those of the fourth example will be described with the same reference numerals.

[0081] The difference between the magnetic eraser 4 of the fifth example and the first example is that the non-magnetized surface 6 of the single-sided multi-polar magnetized rubber magnet 2a is the erasing surface side 3, and the magnetization pitch of the single-sided multi-polar magnetized rubber magnet 2a is selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103.

[0082] In the fifth example, the magnetization pitch of the single-sided multi-pole magnetized rubber magnet 2a is selected, and the magnetization pitch of the single-sided multi-pole magnetized rubber magnet 2a is set to a magnetization pitch that is suitable for the density of the magnetic lines of force emanating from the erasure surface side 3 to aggregate the magnetic particles 104 near the center of the microcapsules 103, with the thickness of the surface substrate 15 of the microcapsule magnetic phoretic display 101 as the space.

[0083] By selecting a single-sided multi-pole magnetized rubber magnet 2a with a narrow magnetization pitch, the density of the magnetic lines of force decreases over a short distance, and the thickness of the surface substrate 105 of the microcapsule magnetic phoretic display 101 becomes a space, making it possible to create a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsule 103.

[0084] Then, by scanning the recording surface 102 of the microcapsule magnetophoretic display 101 with the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a of the magnetic eraser 1, the magnetic recording display of black letters or images displayed on the recording surface 102 can be erased, as in the first example.

[0085] In addition, as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 to the center of the microcapsules 103, the selection of the magnetization pitch of the single-sided multi-pole magnetized rubber magnet 2a of the fifth example and the selection of the thickness of the single-sided multi-pole magnetized rubber magnet 2a of the fourth example may be used in combination.

[0086] FIG. 5 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The sixth example of the embodiment of the sixth example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0087] The magnetic erasing tool 1 of the sixth example is the same in basic configuration as the magnetic erasing tool 1 of the first example, and the same components as those of the first example will be described using the same reference numerals.

[0088] The difference between the magnetism erasing tool 1 of the sixth example and the first example is that the non-magnetized surface 6 of the single-sided multi-polar magnetized rubber magnet 2a is the erasing surface side 3.

[0089] In the sixth example, as in the first example, a spacer layer 5a made of a non-magnetic material is provided on the erasing surface side 3 as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0090] According to the sixth example of the magnetic eraser 1 configured in this manner, as in the first example, the density of the magnetic lines of force emanating from the erasing surface side 3 can be made to be a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103, and by scanning the recording surface 102 of the microcapsule magnetophoretic display 101 with the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a of the magnetic eraser 1, the magnetic recording display of black letters or images displayed on the recording surface 102 can be erased (see Figure 5).

[0091] FIG. 6 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The seventh example of the embodiment of the seventh example Magnetic eraser for 1 is a cross-sectional explanatory diagram showing a schematic representation of the manner in which the recording surface of a microcapsule magnetophoretic display is scanned with a laser to erase the magnetic recording display.

[0092] The magnetic erasing tool 1 of the seventh example is the same in basic configuration as the magnetic erasing tool 1 of the first example, and the same components as those of the first example will be described using the same reference numerals.

[0093] The difference between the magnetism erasing tool 1 of the seventh example and the first example is that, like the sixth example, the non-magnetized surface 6 of the single-sided multi-polar magnetized rubber magnet 2a is the erasing surface side 3.

[0094] In the seventh example, as in the second example, a spacer layer 5b made of a magnetic material is provided on the erasing surface side 3 as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0095] According to the seventh example of the magnetic eraser 1 configured in this manner, as in the second example, the density of the magnetic lines of force emanating from the erasing surface side 3 can be made to be a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103, and by scanning the recording surface 102 of the microcapsule magnetophoretic display 101 with the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a of the magnetic eraser 1, the magnetic recording display of black letters or images displayed on the recording surface 102 can be erased (see Figure 6).

[0096] FIG. 7 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The eighth example of the embodiment of the eighth example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0097] The magnetic erasing tool 1 of the eighth example is the same in basic configuration as the magnetic erasing tool 1 of the first example, and the same components as those of the first example will be described using the same reference numerals.

[0098] The difference between the magnetic eraser 1 of the eighth example and the first example is that, like the sixth example, the non-magnetized surface 6 of the single-sided multi-pole magnetized rubber magnet 2a is the erasing surface side 3.

[0099] In the eighth example, as in the third example, a spacer layer 5b made of a magnetic material and a spacer layer 5a made of a non-magnetic material are provided on the erasing surface side 3 as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103.

[0100] According to the eighth example of the magnetic eraser 1 configured in this manner, as in the third example, the density of the magnetic lines of force emanating from the erasing surface side 3 can be made to be a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103, and by scanning the recording surface 102 of the microcapsule magnetophoretic display 101 with the erasing surface side 3 of the single-sided multi-pole magnetized rubber magnet 2a of the magnetic eraser 1, the magnetic recording display of black letters or images displayed on the recording surface 102 can be erased (see Figure 7).

[0101] FIG. 8 is a diagram illustrating the present invention. Microcapsule magnetophoretic display system The ninth example of the embodiment of the ninth example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0102] The magnetic erasing tool 1 of the ninth example is the same in basic configuration as the magnetic erasing tool 1 of the fourth example, and the same components as those of the first example will be described using the same reference numerals. The difference between the demagnetizer 1 of the ninth example and the fourth example is that a magnetic material 7 is provided on the magnetized surface 4.

[0103] According to the ninth example of the magnetic erasing tool 1, a magnetic material 7 is placed on the magnetized surface 4, so that the magnetic force emanating from the non-magnetized surface 6 can be strengthened when the magnetic force of the single-sided multi-pole magnetized rubber magnet is weak. Even when the magnetic force is strengthened, the density of the magnetic lines of force emanating from the erasing surface side 3 can be controlled to a magnetic force suitable for agglomerating the magnetic particles 104 near the center of the microcapsules 103 by controlling the thickness of the spacer layer 5a.

[0104] Although not shown, in the tenth example of the magnetic erasure tool 1, a magnetic material 7 is placed on the magnetized surface 4 of the fifth example, in the eleventh example of the magnetic erasure tool 1, a magnetic material 7 is placed on the magnetized surface 4 of the sixth example, in the twelfth example of the magnetic erasure tool 1, a magnetic material 7 is placed on the magnetized surface 4 of the seventh example, and in the thirteenth example of the magnetic erasure tool 1, a magnetic material 7 is placed on the magnetized surface 4 of the eighth example.

[0105] The effects of the magnetic erasers 1 of the tenth to thirteenth examples are similar to that of the magnetic eraser 1 of the ninth example.

[0106] In the first to thirteenth embodiments described above, the multi-pole magnetized rubber magnet 2 used is not particularly limited in shape or size, and may have any shape and size that is easy to handle as a magnetism erasing tool.

[0107] FIG. 9 is a diagram of the present invention. Microcapsule magnetophoretic display system 14th example of the embodiment Magnetic eraser for FIG. The magnetic erasing tool 1 of the 14th example is based on the magnetic erasing tool 1 of the first example, and the ends on both sides of the scanning direction (arrow direction) of the multi-pole magnetized rubber magnet 2 of the magnetic erasing tool 1 of the first example are curved in a direction away from the recording surface 102 of the microcapsule magnetic phoretic display 101.

[0108] In Figure 9, the 14th example of magnetic erasing tool 1 is based on the 1st example of magnetic erasing tool 1, but other examples of the 14th example of magnetic erasing tool 1 can be based on the 2nd to 13th examples of magnetic erasing tools 1, although not shown.

[0109] In the 14th example, cutting the multi-pole magnetized rubber magnet 2 causes disturbances in the density and direction of the magnetic lines at the end, but since the end of the multi-pole magnetized rubber magnet 2 is curved away from the recording surface 102 of the microcapsule magnetophoretic display 101, the end where the disturbances in the density and direction of the magnetic lines occur can be avoided from being used as the erasure surface side 3, and the recording surface 102 of the microcapsule magnetophoretic display 101 becomes an erasure surface with a more uniform color tone.

[0110] 10(A) and (B) are diagrams showing the construction of the present invention. Microcapsule magnetophoretic display system 15th example of the embodiment of the embodiment of the 15th example Magnetic eraser for 1 is a cross-sectional explanatory diagram that schematically shows how the recording surface of a microcapsule magnetophoretic display is scanned with a laser (in the direction of the arrow) to erase the magnetic recording display.

[0111] The magnetic eraser 1 of the 15th example has one or more multi-pole magnetized rubber magnets 2 equipped with a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side 3 of the first to thirteenth examples, and one or more non-erasing multi-pole magnetized rubber magnets 8 arranged in parallel in the magnetization direction, which do not have a control means and turn the recording surface 102 of the microcapsule magnetophoretic display 101 black by scanning it. A known multi-pole magnetized rubber magnet is used for the non-erasing multi-pole magnetized rubber magnet 8.

[0112] If the microcapsule magnetophoretic display 101 is not used frequently and is not used for a long time, the mobility of the magnetic particles 104 in the microcapsules 103 during writing and erasing may decrease. In this case, it is necessary to impart magnetism to the magnetic particles 104 to activate them and improve their mobility.

[0113] In the 15th example, a multi-pole magnetized rubber magnet 2 equipped with a control means for controlling the density of the magnetic lines of force coming out from the erasure surface side 3, and one or more non-erasing function multi-pole magnetized rubber magnets 8 which do not have a control means and which turn the recording surface 102 of the microcapsule magnetophoretic display 101 black by scanning the recording surface 102, are arranged in parallel parallel to the magnetization direction.By scanning the recording surface 102, the non-erasing function multi-pole magnetized rubber magnet 8 activates the magnetic particles 14 in the microcapsules 103 and turns the recording surface 102 black, and the multi-pole magnetized rubber magnet 2 equipped with a control means can erase the black color of the recording surface 102, so that the activation of the magnetic particles 104 and the erasure of the black color of the recording surface 102 can be performed in a single operation.

[0114] Figure 10(A) shows one example of the 15th example, and Figure 10(B) shows another example of the 15th example. In the magnetic erasing tool 1 of the 15th example shown in Figure 10(A), the non-erasing function multi-polar magnetized rubber magnet 8 is positioned at the leading end of the scanning direction (arrow direction) of the multi-polar magnetized rubber magnet 2, and in the magnetic erasing tool 1 of the 15th example shown in Figure 10(B), the non-erasing function multi-polar magnetized rubber magnet 8 is positioned in the center of the scanning direction of the multi-polar magnetized rubber magnet 2. There are no particular restrictions on the position of the non-erasing function multi-polar magnetized rubber magnet 8 on the multi-polar magnetized rubber magnet 2, as long as it is not at the trailing end of the multi-polar magnetized rubber magnet 2 in the scanning direction.

[0115] The magnetic eraser 1 of Examples 1 to 15 configured as described above has a multi-pole magnetized rubber magnet 2 that can be easily cut or punched and is flexible, which allows for greater freedom in size and shape of the magnetic eraser 1 and allows for lighter weight, so that it can easily accommodate even a large microcapsule magnetophoretic display 101 the size of a whiteboard, for example. [Example]

[0116] The present invention will be explained below with reference to the examples and comparative examples shown in Table 1. Regarding the magnetic erasing tool provided in the microcapsule magnetophoretic display system Although specific examples will be described, the present invention is not limited to these examples.

[0117] The recording surface of a microcapsule magnetophoretic display, which can be erased from the recording surface side, was scanned with a 2.0 mm pitch, 250 gauss, multi-pole magnetized rubber magnet without erasure function to produce a black surface, and the recording surface was scanned back and forth twice with various combinations of multi-pole magnetized rubber magnets and spacers, and the whiteness of the erased surface was measured using an X-Rite 504 spectrodensitometer.

[0118] The multi-pole magnetized rubber magnets A to F used are shown below. A: 0.45mm thick, 2.0mm pitch, 200 gauss B: 2.0mm thickness, 2.0mm pitch, 250 gauss C: 1.0 mm thick, 2.5 mm pitch, 450 gauss D: 1.0mm thickness, 3.0mm pitch, 500 gauss E: 2.0mm thick, 4.0mm pitch, 700 gauss F: 3.0mm thickness, 5.0mm pitch, 800 gauss

[0119] The results are shown in Table 1.

[0120] [Table 1]

[0121] Judgment (evaluation) ◎ indicates an erasing surface with particularly excellent whiteness ○ indicates an erasing surface with good whiteness △ indicates low whiteness but usable erasing surface × indicates an erasable surface with poor whiteness that cannot be used, or an erasable surface that cannot be erased

[0122] The measurement values obtained using the X-Rite 504 spectrodensitometer indicate that the smaller the value, the whiter the color, and the larger the value, the blacker the color.When a non-erasing multi-pole magnetized rubber magnet was scanned to produce a black surface, the measurement value was 0.55, and many of the examples showed good erasability. In the comparative example, when the spacer thickness was insufficient or excessive, a good white surface could not be obtained.

[0123] [Microcapsule Magnetophoretic Display System] Next, the microcapsule magnetophoretic display system according to the present invention will be described.

[0124] A microcapsule magnetophoretic display system 11 according to the present invention comprises a microcapsule magnetophoretic display 101, a magnetic writing implement 12 for applying a magnetic field to the microcapsule magnetophoretic display 101 to write and display a magnetic recording display of black characters or images on a recording surface 102, and a magnetic eraser 1 of any of the first to fifteenth examples. The magnetic writing implement 12 is not particularly limited, and any known magnetic writing implement can be used.

[0125] In the microcapsule magnetophoretic display system 11 configured in this manner, the magnetic writing implement 12 and the magnetic eraser 1 may be configured as separate entities or as an integrated entity. When the magnetic writing implement 12 and the magnetic eraser 1 are separate, magnetic erasers 1 of different sizes can be easily obtained, which is suitable for adapting the size of the magnetic eraser 1 to any size of the screen of the recording surface 102 of the microcapsule magnetophoretic display 101. Also, when the magnetic writing implement 12 and the magnetic eraser 1 are integrated, the magnetic eraser 1 is necessarily small, The magnetic eraser 1 of the present invention can easily accommodate this requirement, and is particularly suitable for cases where the recording surface 102 of the microcapsule magnetophoretic display 101 is a small screen, and is also suitable for cases where partial corrections are required in the middle of writing, even on large screens.

[0126] FIG. 11 shows a microcapsule magnetophoretic display system 11 in which a magnetic writing implement 12 and a magnetic eraser 1 are integrated. whole 1, magnetic erasers 1 are provided at two locations: one axial end of body 13 of magnetic writing implement 12 (the end opposite the pen tip) and one side of body 13.

[0127] The microcapsule magnetic migration display system 11 configured as described above includes a microcapsule magnetic migration display 101, a magnetic writing instrument 12 for applying a magnetic field to the microcapsule magnetic migration display 101 and writing and displaying a magnetic recording display of black letters or images on the recording surface 102, and a magnetic eraser 1 of any of the first to fifteenth examples.Therefore, the tasks of writing and displaying a magnetic recording display of black letters or images on the recording surface 102 of the microcapsule magnetic migration display 101 using the magnetic writing instrument 12 and erasing the magnetic recording display displayed on the recording surface 102 using the magnetic eraser 1 can be performed efficiently and without stress.

[0128] Furthermore, by making the magnetic writing implement 12 and the magnetic eraser 1 separate, the size of the magnetic eraser 1 can be easily adapted to the size of the screen of the recording surface 102 of the microcapsule magnetic phoretic display 101, making it easy to write and erase regardless of the size of the screen of the recording surface 102 of the microcapsule magnetic phoretic display 101.

[0129] Furthermore, the magnetic erasing tool 1, which is an integrated magnetic writing implement 12 and magnetic erasing tool 1, has an appropriate controlled magnetic force, so the magnetic effect on the surrounding area is small, and the target to be erased can be erased within an accurate range. [Industrial Applicability]

[0130] The present invention is widely used as a magnetic erasing tool for a microcapsule magnetophoretic display that can erase from the surface side of the recording surface, and as a microcapsule magnetophoretic display system, in stationery, toys, etc. [Explanation of symbols]

[0131] 1. Magnetic eraser 2 Multi-pole magnetized rubber magnet 2a Single-sided multi-pole magnetized rubber magnet 3 Erasing side 4 Magnetized surface 5a Spacer layer made of non-magnetic material 5b Spacer layer made of magnetic material 6 Non-magnetized surface 7 Magnetic materials 8. Erasable Non-functional Multi-pole Magnetized Rubber Magnet 11 Microcapsule Magnetophoretic Display System 12 Magnetic writing implements 13 Torso 101 Microcapsule Magnetophoretic Display 102 Recording surface 103 Microcapsules 104 Magnetic particles 105 Surface Board

Claims

1. A microcapsule magnetophoretic display system comprising a microcapsule magnetophoretic display, a magnetic writing implement, and a magnetic eraser for scanning the recording surface of the microcapsule magnetophoretic display to apply a magnetic field to the microcapsule magnetophoretic display and erase the displayed magnetically recorded black characters or images, A microcapsule magnetic phoretic display system characterized in that a multi-pole magnetized rubber magnet is used as the erasing means of the magnetic eraser, one side of the multi-pole magnetized rubber magnet is set as the erasing surface side that scans the recording surface of the microcapsule magnetic phoretic display to erase the magnetic recording display displayed on the recording surface, and the density of the magnetic field lines emanating from the erasing surface side is controlled to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

2. The microcapsule magnetic phoretic display system of claim 1, characterized in that the magnetized surface of the multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of a non-magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

3. The microcapsule magnetic phoretic display system of claim 1, characterized in that the magnetized surface of the multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of a magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

4. The microcapsule magnetic phoretic display system of claim 1, characterized in that the magnetized surface of the multi-pole magnetized rubber magnet is the erasing surface side, and a spacer layer made of magnetic and non-magnetic materials is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

5. The microcapsule magnetic phoretic display system described in claim 1, characterized in that the multi-polar magnetized rubber magnet is a single-sided multi-polar magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and the thickness of the single-sided multi-polar magnetized rubber magnet is selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

6. The microcapsule magnetic phoretic display system described in claim 1, characterized in that the multi-polar magnetized rubber magnet is a single-sided multi-polar magnetized rubber magnet, the non-magnetized surface being the erasing surface side, and the magnetization pitch of the single-sided multi-polar magnetized rubber magnet is selected and set as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

7. The microcapsule magnetic phoretic display system described in claim 1, characterized in that the multi-polar magnetized rubber magnet is a single-sided multi-polar magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and a spacer layer made of a non-magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

8. The microcapsule magnetic phoretic display system described in claim 1, characterized in that the multi-polar magnetized rubber magnet is a single-sided multi-polar magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and a spacer layer made of magnetic material is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

9. The microcapsule magnetic phoretic display system described in claim 1, characterized in that the multi-polar magnetized rubber magnet is a single-sided multi-polar magnetized rubber magnet, with the non-magnetized surface being the erasing surface side, and a spacer layer made of magnetic and non-magnetic materials is provided on the erasing surface side as a control means for controlling the density of the magnetic lines of force emanating from the erasing surface side to a magnetic force suitable for agglomerating the magnetic particles in the microcapsules near the center of the microcapsules.

10. A microcapsule magnetic phoretic display system as described in any one of claims 5 to 9, characterized in that the single-sided multi-pole magnetized rubber magnet has a magnetic material installed on the magnetized surface.

Images