JP2012083378A - Image display medium and image display device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display medium capable of preventing the breakage or liquid leakage of a capsule, and the separation of the image display medium, by a simple structure, and being wound up in a small size; and an image display device using the same.SOLUTION: An image display unit 100 comprises a sheet-shaped image display sheet 110, a cylindrical winding-up member 119 capable of winding up the image display sheet 110, and an electromagnetic apparatus 116; and displays an image on the image display sheet 110. As a structure of the image display sheet 110, a plurality of spheres 1 having different surfaces about each hemisphere is provided. In order to display an image by rotating the spheres 1 specified by the electromagnetic apparatus 116 a half-turn, a function for writing and displaying the image by the electromagnetic apparatus 116 while sending out the image display sheet 110, and a function for deleting the displayed image when winding up the image display sheet 110 by the winding-up member 119 are provided.

Description

  The present invention relates to an image display medium using a magnetic recording system, and more particularly to an image display medium using a minute sphere and an image display apparatus using the same.

2. Description of the Related Art Conventionally, as a rewritable medium, a handwritten writing board using a magnetic pen that performs magnetic recording typically by pulling magnetic iron powder with a magnet is known.
Such a writing board using a magnetic recording method has been commercialized as a so-called drawing board, but has been commercialized in various ways as a handwritten memo board because of the ease of writing and erasing.

  Magnetic recording methods include a sheet sealed with magnetic iron powder and a microcapsule type magnetophoresis. As for the magnetic iron powder, for example, a product using a magnetic pen capable of writing in two colors by changing the coloring of the N pole and the S pole to black and red has been commercialized.

  A conventional magnetic iron powder type memo board 200 is formed by an image display sheet 210 and an erasing magnet 213 as shown in FIGS. Characters and images are displayed by moving while touching the surface.

  In the image display sheet 210, black magnetic iron powder 211 is accommodated in the sheet together with the white liquid 212. When the erasing magnet 213 is close to the image display sheet 210, the magnetic iron powder 211 is attracted by the erasing magnet 213. And sinks to the bottom (lower side) of the image display sheet 210. As a result, the surface of the image display sheet 210 appears white due to the white liquid 212.

  When the surface of the image display sheet 210 is traced with the magnetic pen 214, the magnetic iron powder 211 is attracted to the surface of the image display sheet 210 by the magnetic pen 214, and black characters and images are displayed by the magnetic iron powder 211. It becomes a state.

On the other hand, as an image display medium, various reflective electronic papers represented by digital paper have been proposed and commercialized.
Examples of the electronic paper include microcapsule type electrophoresis, toner display, two-color rotating twist ball type electrophoresis, stacked type cholesteric liquid crystal, leuco dye rewritable, and the like. Any electronic paper consumes electricity when an image is written, but the image is held for a long time without power.

  In recent years, there has been a reduction in power consumption. In contrast to liquid crystal monitors and plasma monitors that use backlights, and display media that mainly use organic EL images, electronic paper can be used for electronic book reading, stations, etc. It is used in electronic bulletin boards represented by advertising media. Features include a reflective type that is easy on the eyes, easy to see even under external sunlight, and inexpensive.

  Here, general paper (paper, paper, etc.) to be written can be written with a pencil, ink, etc., erased with an eraser, and rolled, folded, or cut. On the other hand, since electronic paper has an ITO electrode and is driven by static electricity to display it, it has been proposed that it can be bent slightly, but it is actually not rolled up or folded like paper.

  Further, since electronic paper records on a magnetic board written with a magnetic pen by static electricity, partial erasing and writing cannot be performed directly, and it is necessary to input erasing and writing, energize the image, and display it again.

  As an ideal electronic paper, a memo that can be written / erased as a part of a notebook paper, a paper to be pasted on a wall, and a thin sheet-like display medium such as a blind on a window can be considered. In contrast, current electronic paper is still unsuitable.

  Therefore, a microcapsule magnetophoretic display sheet has been proposed as a proposal for such a thin electronic sheet. For example, a liquid in which fine magnetic powder and titanium oxide particles are dispersed on a transparent surface sheet is sealed in a microcapsule, and a magnetic field is applied to migrate the magnetic powder to the surface. A microcapsule magnetic display sheet having an ultraviolet curable resin layer on a microcapsule of ˜600 μm in order has been proposed (see Patent Document 1).

  This sheet has good impact resistance and durability, improved rigidity and flexibility, and a thickness of 500 μm. Intended use is proposed for picture books for infants, toys for infants, character training machines, various game boards, calligraphy boards, memo boards, conference blackboards, various information boards, electronic bulletin boards, PC display panels, etc. Yes.

  As another technique, a microcapsule magnetic recording sheet for facsimile transmission having a solid dispersion layer having a microcapsule enclosing a dispersion containing a white pigment and magnetic particles and a light-absorbing film layer has been proposed (Patent Literature). 2).

  This sheet is flexible and has a total thickness of 380 μm. As a usage, it has been proposed for transmission in a facsimile machine.

  As another technique, the average particle size of the microcapsules enclosing the dispersion, white pigment, additive and magnetic particles is 50 to 650 μm, and the particle size of the magnetic particles is 0.1 to 1.0 μm and 1 to 20 μm. There are proposed two or more types having different particle diameters that can be erased and can be partially erased (see Patent Document 3).

  In a general magnetic board in which magnetic iron powder is enclosed in a honeycomb-shaped frame between a base material and a surface sheet together with a white liquid, the magnetic iron powder is attracted from the back surface to the substrate side by an erasing magnet, and is applied to the surface sheet. Is erased so that the white color of the white liquid can be seen. By writing with a magnetic pen from the surface, the magnetic iron powder is pulled up to the lower surface of the top sheet so that it can be seen and written. Further, the erasing can be partially erased from the back surface with a magnet.

  The thickness of the sheet needs to be 500 μm or more because the white liquid in the case where the magnetic iron powder is erased by pulling it toward the substrate needs to be deep enough to hide the magnetic iron powder. As for the outer size of the honeycomb shape, there is a commercially available one having a size of 3 mm.

Japanese Patent No. 2841294 Japanese Patent No. 3964373 Japanese Patent No. 4089808

  However, in capsule-type magnetophoresis or capsule-type electrophoresis using the microcapsule method, since the capsule is filled with a liquid and has a thickness, the capsule is broken by bending the sheet, causing liquid leakage or separation of the sheet. There is a case. Therefore, there is a problem that even if the sheet can be bent slightly, it cannot be wound small.

  Moreover, in the magnetic board by a magnetic iron powder system, since white liquor is enclosed with the magnetic iron powder in the honeycomb-shaped frame, it may be broken or leaked by bending it too.

  Further, the external shape of the conventional microcapsule is generally 200 μm (made by Chemtech Co., Ltd.), and the honeycomb size of the magnetic iron powder system is generally 3 mm. Thus, there is no problem with thick lines, but there is a problem that thin lines (thickness lines of 0.2 mm or less) cannot be expressed.

  Furthermore, in the erasing operation, it is necessary to arrange an erasing magnet on the erasing side depending on whether to erase by applying a magnetic force from the back surface or erasing from the front surface. Therefore, there is a problem that the structure becomes large.

  Some capsule-type magnetophoresis is devised so that it can be erased from the front side, but generally there are many operations from the back side, and the recording medium requires a space for the erasing magnet mounting part. Therefore, since the height is generally 10 mm or more, it is difficult to say a sheet shape.

  The present invention has been made in view of the above-described conventional problems, and an image display medium that can be wound in a small size by preventing capsule breakage, liquid leakage, and separation of the image display medium with a simple configuration. An object of the present invention is to provide an image display device using the above.

  The present invention is an image display medium that includes a plurality of spheres having different surfaces for each hemisphere, and displays an image by semi-rotating the sphere specified by a magnetic writing member. A magnetic material is used on one hemisphere side.

  In the present invention, the magnetic material may be a metal deposited by a vapor deposition plating method using a shower type ion plating apparatus. Further, a ferrite magnetic material may be used to facilitate reaction to magnetic force.

  In the present invention, it is preferable to magnetize the magnetic body to an N pole or an S pole.

In the present invention, it is preferable that the sphere is made of a glass material.
For example, glass beads having an average particle diameter of about 60 μm may be used as the sphere.

In the present invention, it is preferable that one hemisphere side is white and the other hemisphere side is black as the configuration of the sphere.
For example, by coloring the sphere in white and coloring the hemispherical magnetic body in black, characters and images can be expressed by switching between white and black by rotation. Further, when transparent glass beads are used as the spheres, light enters the glass beads and is reflected, so that the three primary colors of red, blue and green may be lightly colored. This makes it possible to perform color expression.

  The present invention also includes a sheet-like frame including a plurality of cells that individually store the spheres, a base sheet, and a surface sheet as the configuration of the image display medium, and the spheres are included in the cells. It is preferable that the frame is integrally formed by sandwiching the frame body between the base sheet and the top sheet in a state of being rotatably accommodated.

  In the present invention, it is preferable that the frame is formed of the plurality of cells having a honeycomb structure.

In the present invention, it is preferable that the base sheet has magnetism.
For example, the base sheet may be a rubber sheet in which a magnetic metal powder is kneaded.

  In the present invention, when the writing member is opposed to the top sheet side in a state where the hemispherical side using the magnetic body of the sphere is disposed facing the base sheet side, the writing member faces the writing member. It is preferable that the sphere is half-rotated and the hemisphere side using the magnetic body of the sphere is arranged to face the surface sheet side.

  Further, according to the present invention, when the writing member has the characteristics of a magnetic pole on the hemispherical side using the magnetic material of the sphere and a reverse magnetic pole, the hemispherical side using the magnetic material of the sphere is attracted to face the surface sheet side. When the hemispherical magnetic pole using the spherical magnetic body has the same magnetic characteristics, it is preferable that the hemispherical side using the spherical magnetic body is repelled and directed in the opposite direction to the topsheet side.

  The present invention also provides an image display device that includes a sheet-like image display medium, a cylindrical body capable of winding the image display medium, and a magnetic writing member, and displays an image on the image display medium. And using the image display medium according to any one of claims 1 to 9 as the image display medium, a function of displaying an image by the writing member while feeding the image display medium, And a function of erasing an image displayed on the image display medium when the image display medium is wound up by a cylindrical body.

  Further, according to the present invention, as the configuration of the writing member, a magnetized portion using an electromagnet is provided, and the magnetized portion is moved in a direction substantially perpendicular to the direction in which the image display medium is sent out along the image display medium. Thus, it is preferable to display an image on the image display medium to be sent out.

  According to the present invention, there is provided an image display medium that includes a plurality of spheres having different surfaces for each hemisphere, and displays an image by half-rotating the sphere specified by a magnetic writing member. By using a magnetic body on either hemisphere side, the sphere can easily react to the magnetic force, so that the sphere can be easily rotated in the air without causing the sphere to migrate by liquid filling. In addition, since no microcapsule is used, it is possible to prevent liquid leakage and separation of the image display medium, and an image display medium that can be wound small with a simple structure can be realized.

  Further, according to the present invention, when the magnetic body is magnetized to the N or S pole, for example, when the N pole is magnetized on the outer periphery of the magnetic body, the writing member attracts the S pole, Since it can be repelled at the pole, writing and erasing can be performed by switching the S pole / N pole.

  Moreover, according to this invention, it becomes easy to perform rotation operation by comprising the said spherical body using a glass material.

  Further, according to the present invention, the configuration of the sphere can be clarified when the sphere is half-rotated by making one hemisphere side white and the other hemisphere side black.

  Further, according to the present invention, as the configuration of the image display medium, the image display medium includes a sheet-like frame including a plurality of cells that individually store the spheres, a base sheet, and a surface sheet, The spherical body can be easily rotated in the frame body by integrally constructing the frame body between the base sheet and the top sheet in a state of being rotatably accommodated in the cell. .

  In addition, according to the present invention, since the frame is formed of the plurality of cells in a honeycomb structure, the gap between the base sheet and the surface sheet can be kept constant, so that the sphere can be stably stored. Can do.

  Further, according to the present invention, the base sheet is made magnetic (for example, the base sheet is a rubber sheet kneaded with magnetic metal powder), and the base sheet Spherical magnetic material is easily adsorbed on the side.

  Further, according to the present invention, when the writing member is opposed to the top sheet side with the hemisphere side using the spherical magnetic body facing the base sheet side, the writing member and The opposing sphere is half-rotated, and the hemisphere side using the sphere's magnetic body is arranged to face the top sheet side, thereby easily displaying an image by changing the magnetization position by the writing member. be able to.

  Further, according to the present invention, when the writing member has the characteristics of a magnetic pole on the hemispherical side using the magnetic material of the sphere and a reverse magnetic pole, the hemispherical side using the magnetic material of the sphere is attracted to the surface sheet side. The face sheet is displayed by reversing the hemispherical side using the magnetic body of the sphere when an image including characters and pictures is displayed by being opposed to each other and has the same magnetic pole characteristics as the magnetic pole on the hemispherical side using the spherical magnetic body. An image including a character and a picture can be erased by facing in the opposite direction to the side.

  In addition, according to the present invention, an image includes a sheet-like image display medium, a cylindrical body capable of winding the image display medium, and a magnetic writing member, and displays an image on the image display medium. A display device, wherein the image display medium according to any one of claims 1 to 9 is used as the image display medium, and an image is displayed by the writing member while the image display medium is being sent out. And a function of erasing the image displayed on the image display medium when the image display medium is wound up by the cylindrical body, so that an image can be displayed on the image display medium with a simple configuration. You can easily erase the image.

  According to the invention, the writing member includes a magnetized portion using an electromagnet as a configuration of the writing member, and the magnetized portion is substantially perpendicular to the direction in which the image display medium is sent out along the image display medium. By moving the image display medium, the image display medium is displayed on the image display medium, for example, when the image is displayed on the image display medium with the magnetized portion as the N magnetic pole. When winding, the image can be easily erased from the image display medium by using the magnetized portion as the S magnetic pole.

It is explanatory drawing which shows the structure of the spherical body which comprises the image display medium which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the said spherical body. It is explanatory drawing which shows the other example of a structure of the said spherical body. It is explanatory drawing which shows the modification of the structure of the said spherical body. (A) is a top view which shows the structure of the image display sheet of Example 1 of this embodiment, (b) is a side view which shows the structure of the said image display sheet. (A) is explanatory drawing which expanded the A section of Fig.5 (a) which shows the structure of the said image display sheet, (b) is BB sectional drawing of Fig.6 (a). (A) is a side sectional view showing a state in which an image is displayed on the image display sheet, (b) is a side sectional view showing a state in which the image display sheet is curved, and (c) is displayed on the image display sheet. It is side surface sectional drawing which shows the state by which the done image was erase | eliminated. (A) is explanatory drawing by the side view which shows the structure of the image display unit of Example 2 of this embodiment, (b) is explanatory drawing by the front view which shows the structure of the said image display unit. (A) is a top view which shows the structure of the conventional magnetic iron powder type memo board, (b) is side sectional drawing which shows the structure of the said memo board.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an example of an embodiment for carrying out the invention, and is an explanatory diagram showing a configuration of a sphere constituting an image display medium according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a configuration of the sphere, and FIG. 4 is an explanatory diagram showing another example of the configuration of the sphere, FIG. 4 is an explanatory diagram showing a modification of the configuration of the sphere, and FIG. 5A is a plan view showing the configuration of the image display sheet of Example 1 of the present embodiment. FIG. 6B is a side view showing the configuration of the image display sheet. FIG. 6A is an explanatory diagram showing the configuration of the image display sheet. FIG. It is BB sectional drawing of 6 (a).

  The embodiment of the present invention includes a plurality of spheres 1 having different surfaces for each hemisphere, as shown in FIGS. 1, 5A, and 5B, and is specified by a magnetic writing member (not shown). An image display sheet (image display medium) 10 that displays an image by half-rotating the formed sphere 1 is characterized in that the sphere 1 according to the present invention is adopted as the sphere 1.

  As shown in FIG. 1 and FIG. 2, the sphere 1 is configured using spherical glass beads (glass material), and a ferrite-based metal (hereinafter referred to as “metal part”) that is a magnetic body on one hemisphere side. .) 2 is vapor deposited.

  The metal part 2 magnetizes the outer peripheral side of the hemisphere to the north pole (or south pole), changes the direction by rotating half by the magnetic force of the south pole (or north pole) from the outside, and displays an image on the image display sheet 10. To display.

  In the present embodiment, the sphere 1 is mainly composed of glass beads, but a resin, for example, a transparent polycarbonate may be used.

  Originally, glass beads are used for sand mill, sand blast polishing, chemical waste liquid filtration, road signs and road surface reflections, safety clothes, reflective tapes for shoes, etc., space for electronic parts, spacers and decorations. It has been. Among these usages, it is possible to use glass beads having a central outer dimension of 60 μm from among 20 to 100 μm reflective beads used for labeling. Since glass beads are used with different particle sizes by sorting, 60 μm is an average diameter, and actually varies within a range of 53 to 76 μm.

  In the present embodiment, a ferrite metal as a magnetic material is formed on one hemisphere side of the sphere 1 by a vapor deposition plating method using a shower type ion plating apparatus (Japanese Patent No. 3904658, manufacturing apparatus for half-surface coated granular material). Is vapor-plated. The film thickness of this vapor deposition plating was set to 2 μm or more in consideration of the influence of rust and the like on magnetic force and environmental change.

In this embodiment, the vapor deposition plating surface of the metal part 2 is formed in dark gray.
The glass bead sphere 1 and the deposition surface 2a of the vapor deposition plating are formed in a color close to silver. Thereby, the light incident from the glass bead surface on the other hemisphere side of the sphere 1 is reflected by the glass bead and the deposition surface 2a of the vapor deposition plating as shown in FIG.
On the other hand, since the outer peripheral surface of the metal part 2 subjected to vapor deposition plating is formed in dark gray, it does not retroreflect.

  As another example, as shown in FIG. 3, the configuration of the sphere 1 is color-coded into a glass-side hemisphere and a metal-part 2 side hemisphere by painting the outer periphery of the metal part 2 in black. Also good.

  As a modification, the configuration of the sphere 1 is colored white instead of transparent as shown in FIG. 4, so that the hemisphere side on the glass bead side is white and the vapor deposition plating side of the metal part 2 is The display of characters and pictures may be reproduced in black / white / black.

  Furthermore, in order to display an image in color, the glass beads used for the sphere 1 can be colored by control by using, for example, the three primary colors of red, blue, and green lightly.

  In the case of a so-called reflective sheet, the brightness is inferior to that of a backlight-type image display medium in color, but a bulletin board that is thinly color-printed by inkjet on the surface of the reflective sheet of glass beads has been commercialized. As described above, the glass beads of the sphere 1 in the present embodiment are lightly colored so that the light can be brightened by retroreflection of light.

Next, a characteristic configuration of the image display sheet 10 according to the present embodiment will be described with reference to the drawings.
As shown in FIGS. 5A, 5B, 6A, and 6B, the image display sheet 10 of the present embodiment includes a sphere 1, a transparent surface sheet 11, and a sphere 1 individually. A sheet-like frame 12 having a plurality of cells 12a to be housed and a base sheet 13, and the sphere 1 is rotatably housed in the cells 12a, and the frame 12 is attached to the base sheet 13 and the surface. It is configured integrally with the sheet 11.

Example 1
The image display sheet 10 of Example 1 is formed in a business card size (45 × 91 mm). As shown in FIG. 5B, the top sheet 11, the frame body 12, and the base sheet 13 are each made of an ultraviolet curable resin. It is bonded with an adhesive.

  Specifically, first, the base sheet 13 and the frame 12 are bonded, and the adhesive is cured with ultraviolet rays. Then, as shown in FIGS. It is housed in a honeycomb-shaped cell 12a of the frame 12 with an automatic mounting machine (not shown), and the top sheet 11 is pasted with an ultraviolet curable resin adhesive in a state where the sphere 1 is adsorbed to the base sheet 13 side. Apply and cure the adhesive with UV light.

  In the first embodiment, the image display sheet 10 is described as having a business card size, but a large size is also possible. For example, a sheet having a width of 1 m × 2 m is also possible.

The top sheet 11 is formed of a transparent sheet of PET (polyethylene terephthalate) having a thickness of 25 μm. The thickness of the top sheet 11 may be 50 μm in consideration of strength, and may be 75 μm if the size is larger.
In addition to PET, the material of the top sheet 11 may be a transparent resin sheet such as polyester or polyethylene having excellent stretchability.

  As shown in FIGS. 6A and 6B, the frame 12 is a resin material having a thickness of about 0.1 mm, and a plurality of hexagonal cells 12a having a two-sided width of about 0.1 mm are arranged side by side. The honeycomb structure is formed.

  As shown in FIG. 6B, the base sheet 13 is a gray sheet-like member having a thickness of about 0.2 mm and iron powder mixed in a rubber material. Since the base sheet 13 contains iron powder, it attracts and holds the magnet. Therefore, the metal part 2 of vapor deposition plating magnetized to the N magnetic pole on one hemisphere side of the sphere 1 is attracted. In the present embodiment, the base sheet 13 is not magnetized. Further, although the color is gray, it may be white depending on the intended use.

Next, an image display operation using the image display sheet 10 will be described.
The image display sheet 10 can draw an image with a magnetic pen (not shown).

  Since the spherical body 1 in the image display sheet 10 has the outer peripheral side of the metal part 2 on one hemisphere side magnetized by the N magnetic pole, the surface of the spherical body 1 is surfaced from the surface sheet 11 side by the magnetic pen having the pen tip magnetized by the S magnetic pole. By tracing along the sheet 11, the sphere 1 displays a black color by drawing the metal part 2 side on one hemisphere side and making a half turn. By such an operation, characters and images can be drawn by moving the magnetic pen.

  The image display sheet 10 can be used as, for example, a reflection sheet for a bulletin board by making the glass beads of the sphere 1 transparent. Specifically, by sticking a printed or printed film on the top sheet 11, it can be used as a reflection sheet for a bulletin board or an advertising board, and when illuminated, on the metal part 2 side of the sphere 1 by retroreflection on the illumination side The other hemisphere side that is not reflected is brightly reflected, and the visibility is good even from a distance.

  When erasing the image displayed on the image display sheet 10, the surface magnetized with the N magnetic pole of the magnet is brought into contact with the surface sheet 11 side of the image display sheet 10 on which the image is displayed. By reversing the metal part 2 of the sphere 1 to the base material sheet 13 side by the magnetic force, the characters and images displayed in black can be erased.

  On the other hand, when the image display sheet 10 is used as a reflection sheet, conversely, the surface of the image display sheet 10 on which an image is displayed is brought into contact with the surface magnetized by the S magnetic pole of the magnet, thereby causing a spherical body. If the metal part 2 on one hemisphere side of 1 is inverted to the surface sheet side, the inverted area is not reflected and darkens, so that it is possible to display as if the part to be erased on the bulletin board is erased.

  Since the glass beads used for the sphere 1 are generally charged on the positive electrode side, they may adhere to the back surface (negative electrode side) of the top sheet 11 due to static electricity. However, since the metal part 2 of the sphere 1 is attracted to the base sheet 13 side by the magnetic force, it is difficult to attract to the back surface on the top sheet 11 side by the attraction force.

  Moreover, according to the image display sheet 10, the displayed image can be erased regardless of the magnetic force such as a magnet as described above.

Hereinafter, an operation of erasing the image displayed on the image display sheet 10 without using a magnetic force such as a magnet will be described.
FIG. 7A is a side sectional view showing a state in which an image is displayed on the image display sheet of this embodiment, FIG. 7B is a side sectional view showing a state in which the image display sheet is curved, and FIG. It is side surface sectional drawing which shows the state from which the image displayed on the image display sheet was erase | eliminated.

  When the image displayed on the image display sheet 10 is deleted, the image display sheet 10 in a state where the image is displayed as shown in FIG. 7A is displayed as shown in FIG. Inside, the both ends of the base sheet 13 are bent so as to bend downward.

Since the base sheet 13 is made of a rubber sheet, it has a structure that can be easily bent.
Since the frame body 12 is formed of a resin material, it has a spring property and can be rolled up. When the frame body 12 is released from the bent state (released), the frame body 12 has a restoring property that returns to the original flat plate.
Since the surface sheet 11 uses PET with spreadability, it has a property of extending with respect to bending.

  Since the spheres 1 are individually housed in the space of the cell 12a of the frame 12, they are not affected by the bending of the image display sheet 10 itself.

  In this state, when the sheet-like image display sheet 10 is bent around the base sheet 13, the metal part 2 on one hemisphere side of the sphere 1 is on the surface sheet 11 side as shown in FIG. The side on which the characters and pictures are displayed is pressed to the base sheet 13 side by the extension of the top sheet 11, the frame 12 is deflected, and the sphere 1 rotates with a gap between the cell 12a and the frame 12 being widened. It becomes easy. Thereby, half rotation is performed so that the metal part 2 of the sphere 1 faces the base sheet 13.

  In addition, as described above, the sphere 1 is charged with static electricity plus with respect to the movement of bending the base sheet 13 shown in FIG. This state is also a state in which the sphere 1 is easy to rotate.

  When the bent state of the image display sheet 10 is released in this state, the image display sheet 10 returns to the original state due to the spring property of the frame 12 as shown in FIG.

By changing the polarity of the magnetic pen from the S pole to the N pole and tracing the part where characters and pictures are displayed by the metal part 2 of the sphere 1 shown in FIG. The sphere 1 is counter-rotated by the repulsion of the magnetic force of the pen, and the characters and pictures are erased when the metal part 2 faces the base sheet 13 side.
In this way, the image displayed on the image display sheet 10 can be easily erased.

(Example 2)
The image display unit (image display device) 100 according to the second embodiment is configured such that the image display sheet 110 can be wound, and characters and images are written to and erased from the image display sheet 110.
FIG. 8A is a side view illustrating the configuration of the image display unit according to the second embodiment, and FIG. 8B is a front view illustrating the configuration of the image display unit.

  The image display unit 100 includes a sheet-like image display sheet 110, a winding member (cylindrical body) 119 that winds up the image display sheet 110, and an electromagnetic device (writing) that writes characters and images on the sheet-like image display sheet 110. Member 116, a carriage 117 that supports the electromagnetic device 116, and a scan shaft 118 that operates the carriage 117.

  A plurality of the electromagnetic devices 116 are attached to the carriage 117, and write data by reciprocating along the scan axis 118.

  The image display unit 100 is configured to write image data as characters and pictures on the image display sheet 110 by an electromagnetic device 116 instead of a conventional magnetic pen.

  When an image is written on the image display sheet 110 by the image display unit 100, the image is written by the reciprocating motion of the ceramic 116 and the feeding operation of the image display sheet 110 while pulling out the image display sheet 110. Thereby, an image is displayed by the half rotation of the sphere 1 at the position specified on the image display sheet 110.

  When erasing the image displayed on the image display sheet 110, the image display sheet 110 is wound by the winding member 119, and the image display sheet 110 is curved to bend the image to erase the image. The image displayed on can be deleted.

  By configuring the image display unit 100 in this way, the image display sheet according to the present embodiment can be developed for an advertising medium such as a station poster or advertisement display that does not always switch display.

  Since it comprised as mentioned above, according to this embodiment, in the image display sheet 10, the metal part 2 which carried out the vapor deposition plating of the ferrite-type metal in any one hemisphere side of the spherical body 1 for image display is formed. Therefore, liquid is not enclosed in the image display medium as in the past and the spheres are not migrated, and since no microcapsule is used as in the conventional case, liquid leakage from the image display medium and image display An image display sheet that can prevent the medium from separating can be realized.

  Further, according to the present embodiment, the frame body 12 is formed of a resin material, and the base sheet 13 is formed of a rubber sheet having a thickness of about 0.2 mm and iron powder mixed in a rubber material. It can be rolled small with a simple structure. Moreover, since it comprised in this way, the image displayed on the image display sheet 10 can be easily erase | eliminated by curving the image display sheet 10 with the base material sheet 13 inside.

  Furthermore, by using the image display sheets 10 and 110 of the above-described embodiments and examples, for example, a writing erasable sheet sandwiched between notebooks, a writable erasable sheet affixed to a wall, a writable erasable electronic memo, Development on a sheet-like electronic bulletin board is possible.

  As described above, the present invention is not limited to the above-described embodiments and examples, and various modifications can be made within the scope of the claims. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the claims, that is, changes are made as appropriate without departing from the scope of the present invention. Embodiments obtained by combining technical means are also included in the technical scope of the present invention.

1 Sphere 2 Metal part (Magnetic material)
2a Adhesion surface 10,110 Image display sheet (image display medium)
DESCRIPTION OF SYMBOLS 11 Top sheet 12 Frame 12a Cell 13 Base material sheet 100 Image display unit (image display apparatus)
116 Porcelain (writing member)
117 Carriage 118 Scan axis 119 Winding member (cylindrical body)
214 Magnetic pen (writing member)

Claims (11)

  An image display medium comprising a plurality of spheres having different surfaces for each hemisphere and displaying an image by half-rotating the sphere specified by a magnetic writing member, the hemisphere side of any one of the spheres An image display medium characterized by using a magnetic material.   The image display medium according to claim 1, wherein the magnetic body is magnetized to an N pole or an S pole.   The image display medium according to claim 1, wherein the sphere is configured using a glass material.   4. The image display medium according to claim 1, wherein the sphere has one hemisphere side white and the other hemisphere side black. 5. The image display medium includes a sheet-like frame including a plurality of cells that individually store the spheres, a base sheet, and a surface sheet.
The state in which the sphere is rotatably accommodated in the cell and is configured integrally with the frame sandwiched between the base sheet and the top sheet. The image display medium according to any one of the above.   The image display medium according to claim 5, wherein the frame has the plurality of cells formed in a honeycomb structure.   The image display medium according to claim 5, wherein the base sheet has magnetism. In a state where the hemisphere side using the magnetic body of the sphere is arranged facing the base sheet side,
When the writing member is opposed from the top sheet side, the sphere facing the writing member is half-rotated, and the hemispherical side using the magnetic body of the sphere is disposed facing the top sheet side. The image display medium according to any one of claims 5 to 7.   When the writing member has characteristics of a magnetic pole on the hemispherical side using the magnetic material of the sphere and a reverse magnetic pole, the hemispherical side using the magnetic material of the sphere is attracted to face the surface sheet side, and the magnetic material of the sphere The hemispherical side using the magnetic body of the sphere is repelled so that the hemispherical side using the magnetic body is directed in the direction opposite to the surface sheet side. Image display media. An image display device comprising a sheet-like image display medium, a cylindrical body capable of winding the image display medium, and a magnetic writing member, and displaying an image on the image display medium,
Using the image display medium according to any one of claims 1 to 9 as the image display medium, the function of displaying an image by the writing member while feeding the image display medium, and the cylindrical body An image display device comprising: a function of erasing an image displayed on the image display medium when the image display medium is wound up.   The writing member includes a magnetized portion using an electromagnet, and the image sent out by moving the magnetized portion in a direction substantially perpendicular to the direction in which the image display medium is sent out along the image display medium. The image display apparatus according to claim 10, wherein an image is displayed on a display medium.

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