JPH07112592A - Magnetic display medium - Google Patents

Abstract

PURPOSE:To provide a magnetic display medium capable of storing a large quantity of data, capable of easily confirming data content visually only by looking a card and achieved in diversification from the aspect of use. CONSTITUTION:A magnetic display medium is constituted by providing a data housing part 4 and a magnetic display part 10 on a substrate and the data housing part 4 is composed of an optical recording member and the magnetic display part 10 has a magnetic recording layer formed by applying a microcapsule containing a liquid and the magnetic powder suspended in the liquid and responding to a magnetic field on a substrate and visible data can be recorded and erased on the magnetic recording layer of the magnetic display part 10 on the basis of the data in the data housing part. A magnetic stripe and/or an IC module may be provided on the substrate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic display medium provided with a magnetic display unit capable of recording and erasing visible information.

[0002]

2. Description of the Related Art In recent years, optical recording materials for recording information as optical information have a large amount of information that can be stored.
It is used for optical cards for medical use. When such an optical card is put on an information reading device (reader), the recorded content of information is displayed on the display of the device and can be read visually.

[0003]

However, although the conventional optical card has an excellent advantage that it can store a large amount of information, as described above, an information reading device must be used to visually check the recorded information. I need. Therefore,
Despite the user's desire to visually check the information content of the card at any time by just looking directly at the card, there was no optical card that satisfied such a request. . Further, there is a demand for an optical card that has a wide range of use and has a clear display, can be easily confirmed by visual inspection, and is diversified in use.

The present invention has been made in view of such a situation, and an object thereof is to store a large amount of information, and at any time, by directly looking at a medium such as a card, the information can be stored. It is an object of the present invention to provide a magnetic display medium whose contents can be easily visually confirmed and which has various uses.

[0005]

In order to solve the above problems, the present invention provides a magnetic display medium having an information storage section and a magnetic display section on a substrate, wherein the information storage section is an optical recordable optical disc. The information display section is composed of a recording body, and the magnetic display section has a magnetic recording layer in which microcapsules containing a liquid and magnetic powder floating in the liquid and sensitive to a magnetic field are formed. Based on the stored information, visible information can be recorded and erased on the magnetic recording layer of the magnetic display unit. Further, in order to diversify the usage, the base may be provided with at least one of a magnetic stripe and an IC module.

[0006]

When a vertical magnetic field φv is applied to the magnetic recording layer of the magnetic display medium of the present invention as shown in FIG. 8, the magnetic powder 22a in the microcapsules 22 is vertically aligned in the liquid 22b, and as a result, Incident light Li from the outside reaches the surface of the substrate 11 and is reflected here to generate reflected light Lo. In this state, the color of the substrate 11 is visually recognized as reflected light. On the other hand, when a parallel magnetic field φp is applied to the magnetic recording layer 20 as shown in FIG. 9, the magnetic powder 22a in the microcapsules 22 is horizontally aligned in the liquid 22b, and incident light Li from the outside is reflected by the magnetic powder 22a. Is reflected light Lo,
In this state, the color of the reflected light from the magnetic powder 22a is visually recognized. Therefore, when the state of FIG. 9 is set to the erased state, a bright metallic color can be visually recognized from the outside, while when the state of FIG. 8 is partially written by the vertical magnetic field φv, this portion becomes black, for example. It is visible and easily readable from outside. It is of course possible to display the recording state and the erasing state in reverse. Further, since the magnetic display medium of the present invention is provided with the information storage section made of an optical recording body capable of optical recording, the optical recording body enables recording of a large capacity and also has the function of preventing tampering.

Further, by providing a magnetic stripe, this magnetic stripe can serve as an ID, and by providing an IC module, this IC module enables writing and erasing of information.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a magnetic display medium according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an X of FIG.
It is a -X sectional view. The magnetic display medium 1 of this embodiment includes a base body 2 serving as a base of the medium, an information storage section 4 incorporated on one plane of the base body 2, and a magnetic display section 10 incorporated on the opposite surface. Have

The substrate 2 is, for example, a plate-like support, which is usually polypropylene, polyethylene, polyethylene terephthalate, vinyl chloride, ABS, PBT,
It is made of various plastics such as POM (polyacetal), various metals, and various cardboards. The size of the base 2 is not particularly limited, but is usually a size corresponding to a card that can be easily carried. The thickness is about 0.5 to 2.0 mm.

As an information storage unit 4 incorporated in one plane of the base 2, an optical recording body 40 capable of optical recording, the details of which are shown in FIG. 4, is fixed along the longitudinal direction. This figure is a cross-sectional view of the information storage section 4 shown in FIGS. 1 and 2 taken along a plane orthogonal to its longitudinal direction.

This optical recording body 40 comprises a transparent protective layer 41 and
The pattern layer 42 formed on this and the optical recording material layer 43 formed on this are provided.

As the transparent protective layer 41, a material having a small birefringence is particularly preferable, and specifically, polycarbonate, polymethylmethacrylate (PMMA), polyester, epoxy resin, polyolefin, polystyrene,
Resins such as polyvinyl chloride and acetate, and glass are used. The transparent protective layer 41 has a thickness of 100 to 7
It is set to about 60 μm.

The pattern layer 42 is for forming irregularities of the guide track and the recording surface track on the transparent protective layer 41, and is usually a molding resin (for example, 2P: photo) made of a material different from that of the transparent protective layer 41. However, when the transparent protective layer 41 is formed by injection molding, the transparent protective layer 41 and the pattern layer 42 may be integrally formed of the same material. The following may be used as the molding resin.

(A) Ionizing radiation curable resin Electron beam curable resin Urethane acrylate, oligoester acrylate,
Trimethylolpropane triacrylate, neopentyl glycol diacrylate, epoxy acrylate,
Polymerizable oligomers or monomers having an acryloyl group such as polyester acrylate, polyether acrylate, and melamine acrylate, or monofunctional or polyfunctional monomers containing a polymerizable vinyl group such as these oligomers and monomers, acrylic acid, acrylamide, acrylonitrile, and styrene. A mixture of. UV curable resin A resin obtained by adding a photopolymerization initiator, a sensitizer or a desired additive to the above resin composition.

(B) Thermosetting resin Epoxy resin, melamine resin, unsaturated polyester resin, urethane resin, urea resin, amide resin, phenol / formalin resin.

A rough surface having a surface roughness of about 0.05 to 5 μm is formed on the concave or convex surface of the pattern layer 42. In FIG. 7, the surface at the position of the concave surface 42a is a rough surface. This rough surface is used to reduce the light reflectance, thereby providing a difference in reflectance between the guide track and the recording surface track and distinguishing the two. In general,
The high-reflectance portion is used as the recording surface track and the low-reflectance portion (rough surface forming surface) is used as the guide track. The thickness of the pattern layer 42 is about 0.1 to several μm.

An optical recording material layer 43 is formed on the uneven surface of the pattern layer 42 along the uneven surface. The optical recording material layer 43 is formed of an optically writable material, and is made of, for example, a metal-based material (Ta, Bi, In, Al, C / Al, Cr).
/ Al, Zn / Al, Si, GeSmS, etc., chalcogens (Te, Te-As, Te-Se, Te-Se-A)
_{s, Te-CS 2, Te} -C, Te composites, As-Se
-S-Ge, etc.), oxide (TeO _X, GeO _X, MoO
_X , VO _{2 and the} like), organic materials (cyanine dyes, phthalocyanine dyes) and the like are used.

Among the above materials, particularly the general formula TeOx is used.
A tellurium oxide represented by (x is a positive real number) is preferable.
Note that x is in the range of 0 <x <2. Such an optical recording material layer made of tellurium oxide is particularly excellent in stability and weather resistance as a DRAW type recording layer, and is excellent in recording sensitivity and reproducing sensitivity when the optical recording body is constituted as a so-called closed type. .

The optical recording material layer 43 made of tellurium oxide as described above can be easily formed by, for example, a reactive sputtering method. As another method, each layer having the above-described composition can be formed by depositing tellurium by vacuum vapor deposition and simultaneously irradiating it with an ion beam of an oxygen-containing gas. The thickness of the optical recording material layer 43 thus formed is 100 to
It is set to 1500Å, more preferably 300 to 700Å.

The optical recording body 40 formed as described above is
It is adhered onto the substrate 2 via the adhesive layer 44 (FIG. 1). As the adhesive layer 44, conventionally known ones such as urethane type, epoxy type, acrylic type, vinyl type and amide type can be used, but since they are in contact with the optical recording material layer 43, they have good recording sensitivity and excellent temperature and humidity. Those are preferable. The film thickness is preferably 5 to 100 μm, and more preferably 10 to 50 μm, which has an adhesive force and does not cause delamination. The adhesive is applied by a gravure coating method, a spin coating method, a knife coating method, a silk screen printing method, a T-die coating method, a Miyabar coating method, or the like.
It is applied to the substrate 2 or the transparent protective layer 41 side, and bonded to the transparent protective layer 41 or the substrate 2 side, respectively. For the bonding, a roll press, a flat press, a hot roll press, a hot flat press, or the like can be used.

A surface hardened layer 41a is usually formed on the surface of the transparent protective layer 41 for surface protection.
As a material for forming the surface hardened layer 41a, an ultraviolet curable resin, a thermosetting resin or the like is preferably used. Among them, those which are excellent in temperature and humidity and have high hardness and which do not crack even when bent are used. This surface hardened layer 4
1a can be formed by curing after forming a coating film by a spin coating method. Film thickness is 0.5-10μ
It is about m.

Next, an example of a method of manufacturing the information storage section 4 including the above-mentioned optical recording body 40 will be described with reference to FIG.

First, as shown in FIG. 5A, a transparent protective layer 41 having a surface hardened layer 41a is prepared. Then, as shown in FIG. 5B, this transparent protective layer 41
The surface of the mother die 80 on which the surface hardened layer 41a is not provided and the concavo-convex surface of the mother die 80 face each other, and the pattern layer 42
The molding resin for forming the film is sandwiched and, for example, ultraviolet rays are irradiated to cure the resin. The transparent protective layer 4
It is advisable to preliminarily treat the No. 1 pattern layer 42 formation surface side with a primer in order to improve the adhesion. Then, the mother type 80
And the pattern layer 42 is formed on the transparent protective layer 41 (FIG. 5C). The method of manufacturing the mother die 80 will be described later.

An optical recording material layer 43 is formed on the pattern layer 42 thus formed by a vacuum thin film forming method (FIG. 5 (d)). In particular, when tellurium oxide is used for the optical recording material layer 43, the reactive sputtering method is preferably used. An adhesive layer 44 is provided on the optical recording material layer 43 thus formed, and the optical recording body 4 and the substrate 2 are bonded by this adhesive layer 44 (FIG. 5E).

A method of manufacturing the mother die 80 used to form the pattern layer 42 will be described with reference to FIG.

As shown in FIG. 6 (a), a substrate 71 for an original plate is prepared, and a photoresist layer 72 'is applied thereon by spinner coating (after that, prebaking is performed if necessary). , So-called pattern exposure is performed through a mask having a predetermined pattern (guide track width and recording surface track width), and then frosted glass having an average roughness of about 0.3 μm is covered therewith to further expose and roughen the surface. Perform processing. Then, pattern development is performed as shown in FIG. 6B to form a resist pattern 72 having a rough surface 72a. The roughening treatment is disclosed in detail in Japanese Patent Application Laid-Open No. 1-105791 proposed by the present applicant.

The concavo-convex surface of the resist surface roughening original plate 70 thus formed and the newly prepared substrate 81 are opposed to each other, and a mother mask resin 82 (generally an ultraviolet curable resin) is sandwiched between them to form a resin. After curing (Fig. 6)
(C)), the mother mold 80 is obtained by releasing (FIG. 6 (d)).
By using the mother die 80 formed in this way, the pattern layer 42 as described above can be formed.

The magnetic display portion 10 incorporated on one surface of the base 2 has a laminated structure as shown in FIG. That is, the magnetic display unit 10 includes the substrate 11, the magnetic recording layer 20 provided thereon, and the anchor layer 1 provided thereon.
3 and a protective layer 14 provided via

The material of the substrate 11 is not particularly limited as long as it serves as a sheet-shaped support of various plastics, papers, metals, etc., but the substrate 11 itself is colored black or the surface of the substrate 11 is black. A colored material is particularly preferable in order to make the display contrast clear. As a coloring means, for example, barium sulfate, microsilica, carbon black, or another pigment may be kneaded into various plastic raw materials and then molded into a sheet. Such a substrate 11
The thickness is usually about 50 to 200 μm. The magnetic recording layer 20 may be provided directly on the base body 2 of the card without providing the substrate 11, and in this case, the surface of the base body 2 may be colored black.

The magnetic recording layer 20 provided on the substrate 11 or the base 2 of the card as described above includes a plurality of microcapsules 22 and a binder 24. The microcapsule 22 contains a vehicle as a liquid 22b and magnetic powder 22a, and the magnetic powder 22a is in a state of being suspended in the vehicle.

The vehicle preferably contains a polar liquid, a hydrophobic liquid, and a thermoplastic resin. Examples of polar liquids include alcohols, ketones, esters, carboxylic acids, and amino compounds having polar groups such as a hydroxy group, a carbonyl group, a carboxy group, and an amino group. More specifically, esters such as aromatic acid esters, fatty acid esters, alcohol esters, and oxyacid esters are common, and dibutyl phthalate, octidiphenyl phosphate, dioctyl sebacate, triacetone, castor oil, etc. It is mentioned as a suitable example. As the hydrophobic liquid, low volatile aliphatic and aromatic hydrocarbons and mixtures thereof which are commonly used in microcapsules for pressure-sensitive copying paper are suitable. As the thermoplastic resin, any one can be used as long as it can be stably dissolved in the mixed liquid of the polar liquid and the hydrophobic liquid. Among them, those which have good transparency upon dissolution and which do not gel by an electric field, a magnetic field, light, heat, temperature, etc. and which do not adversely affect the microcapsule wall forming reaction are selected. Preferable examples include polyvinyl butyral, polyvinyl acetate, alicyclic saturated hydrocarbon resin, polymethacrylic acid ester, acetyl cellulose, ethyl cellulose and the like.

The viscosity of the vehicle containing such components at room temperature is about 20 to 5000 cp. The viscosity mainly varies depending on the content of the thermoplastic resin, and the content of the thermoplastic resin is about 2 to 50 wt%. Further, the content rate of the polar fluid is appropriately set in consideration of the compatibility with the thermoplastic resin, the stability of the magnetic powder, and the like.

As the magnetic powder 22a, stainless steel such as iron, nickel, iron-nickel, iron-nickel-chromium, aluminum-cobalt alloy, samarium-cobalt alloy or the like is used. The shape of the magnetic powder 22a is preferably a so-called flake shape, and the thickness is preferably as thin as possible and the ratio of the thickness to the particle size is large.
The particle size is about 3 to 15 μm. If the particle size becomes large, it will not be well accommodated in the capsule due to the relationship with the particle size of the capsule, and the reaction to external magnetism will be delayed. On the other hand, when the particle size is small, the difference in the light reflectance between the horizontal direction and the vertical direction when magnetized is small, and the contrast during recording is deteriorated.

The coercive force of such magnetic powder may be appropriately selected depending on the application of the magnetic display medium used, and normally, 500 Oe (Oersted) or more is used. Further, from the viewpoint of improving the dispersibility of the magnetic powder in the vehicle and preventing the magnetic powder from aggregating with each other, the surface of the magnetic powder may be previously coated with various known organic materials. Further, in order to increase the reflectance of the magnetic powder, aluminum, silver or the like may be vapor-deposited on the surface of the magnetic powder.

Further, it is preferable that the microcapsules 22 contain a dye or a pigment in order to improve the contrast. Such microcapsules are disclosed, for example, in US Pat. No. 2,800,458 and British Patent No. 114.
2556, U.S. Pat. No. 4,001,140 and the like. It is manufactured by various known methods. The volume average particle diameter of the microcapsules 22 is preferably 10 to 100 μm. If this value is too small, the total amount of magnetic powder contained in the capsule will be small, and the contrast during recording will not be sufficient. On the contrary, if this value becomes too large, the surface of the magnetic recording layer 20 becomes uneven, and the recorded image becomes non-uniform.

The binder 24 used for coating such microcapsules 22 is not particularly limited as long as it does not damage the microcapsule walls and adheres well to the surface of the substrate 11. More preferable specific examples include hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone and the like. The thickness of the magnetic recording layer 20 containing such microcapsules is usually 50 to 200 μm.

A protective layer 14 is provided on the magnetic recording layer 20 via an anchor layer 13. As the anchor layer 13, a material such as polyester or acrylic is used. The thickness of the anchor layer 13 is 5 to 20 μm.
It is about m. As the protective layer 14, polyester,
A material such as polycarbonate is used. The thickness of the protective layer 14 is about 12 to 100 μm.

The magnetic display portion 10 formed as described above.
It is preferable that the magnetic layer 30 is embedded under the magnetic layer 30 as shown in FIG. The magnetic layer 30 is made of a material such as stainless steel such as iron, nickel, iron-nickel, iron-nickel-chromium, aluminum-cobalt alloy, samarium-cobalt alloy, or the like. Its size is about the same as that of the magnetic display unit 10 and its thickness is 50
It is about 200 μm.

As described above, the magnetic display medium 1 of the present invention is formed by forming the information storage portion 4 and the magnetic display portion 10 on the base 2. The information storage section 4 and the magnetic display section 10 may be formed on the opposite surfaces. Further, the reading of the information stored in the information storing section 4 and the writing of the visible information to the magnetic display section 10 are performed by a device (not shown).

Next, the magnetic display medium having the above structure will be described in more detail with reference to specific examples.

(1) Formation of Information Storage Section Preparation of Resist-Roughened Master Plate A positive resist was spin-coated on an acrylic plate having a thickness of 0.4 mm to a thickness of 5000Å. Then, after prebaking, pattern exposure was performed using a mask having a pattern with a guide track width of 2.5 μm and a recording surface track width of 12 μm. Then, roughening exposure was performed through a ground glass having an average roughness of 0.3 μm. Then, pattern development was performed using a developing solution to produce a resist roughened original plate having a predetermined pattern. A mother mold was produced using the resist roughened original plate in the following manner.

Preparation of Mother Mold An ultraviolet curable resin (mother mask resin) was sandwiched between an acrylic plate having a thickness of 1.2 mm and the resist surface roughening original plate, and pressed at a pressing pressure of 5 kg / cm ² for 30 seconds. After that, the resin was cured by irradiating it with ultraviolet rays from a high pressure mercury lamp, after which the resist roughened master and the acrylic plate were released, and the pattern was duplicated on the acrylic plate side to obtain a mother mold.

Preparation of Optical Recording Material A transparent protective layer made of polycarbonate having a thickness of 400 μm and a surface-hardened layer (hard coat layer) having a thickness of 2 μm provided in advance was prepared. An ultraviolet curable resin (molding resin) for forming a pattern layer was sandwiched between this transparent protective layer and the side of the mother-shaped irregular surface, and after pressing with a pressing pressure of 5 kg / cm ² for 30 seconds. , Irradiate ultraviolet rays with a high pressure mercury lamp to cure the resin, and then,
The mother type and the transparent protective layer were released, and the pattern layer was duplicated on the transparent protective layer side. Then, as an optical recording material layer, a thickness of 5
50Å tellurium oxide (TeOx) was formed by the reactive sputtering method.

Embedding of optical recording material The following two methods were carried out. (First method) Double-sided silk offset printing is performed on a core sheet made of 0.20 mm opalescent vinyl chloride to give a thickness of 0.05 m.
It was sandwiched by two sheets of m oversheet and heat-sealed to prepare a three-layer card base material. 65 on one side of the overseat
A magnetic tape of 0 Oersted was formed. Then, the vinyl chloride base material and the optical recording material were bonded together using an adhesive. After curing the adhesive, the card size (85.5 x 54m
m) was punched out to make an optical card. (Second method) A card size (54 × 85.
A substrate made of PVC resin having a thickness of 6 mm and a thickness of 0.76 mm was prepared. Then, an adhesive is applied onto the optical recording material layer of the optical recording medium, and after cutting this into a predetermined size, the cut optical recording medium is placed in the concave portion for the information storage portion of the substrate. The optical recording medium was fitted and heat-pressed by using a flat press according to the size of the optical recording medium, and the optical recording medium was embedded in the concave portion of the substrate and bonded.

(2) Formation of magnetic display portion Preparation of dispersion of flaky magnetic powder Flake magnetic powder 18.0 g-Fe / Ni alloy, Fe: Ni = 64: 36-Saturation magnetization θs 129-Residual magnetic flux Density θr 65 ・ Holding power Hc 540 ・ Average particle size 9.2 μm ・ Specific surface area 0.096 m ² / g ・ Specific gravity 8.1 Ethyl cellulose (N-7, Hercules, USA) 7.5 g Dimethyl phthalate 36.5 g Phenyl -Xylyl ethane (Nisseki Hysol SAS) 36.5 g Coloring dye (Oil Green 533, manufactured by Orient Chemical Co., Ltd.) 1.5 g While stirring the mixed solution of this composition at 90 ° C, the ethyl cellulose and the coloring dye were dissolved. .

Preparation of stock solution for encapsulation Gelatin 1.5 g Arabic gum 15 g Pure water 170 g A mixed solution of this composition was dissolved at 50 ° C. to obtain a stock solution for encapsulation.

Preparation of Microcapsules 80 g of the above stock solution for encapsulation was added with a 2% NaOH aqueous solution 1.
While adding 7 g and stirring, 60 g of the above magnetic powder dispersion liquid
Was gradually added and then emulsified until the particle size reached 50 μm. Next, 250 g of pure water at about 50 ° C. was added, and the pH of the system was adjusted with a 5% aqueous acetic acid solution while keeping the mixed system with this emulsion at 50 ° C. Then slowly cooling 5
4.2 g of 0% glutaraldehyde was added, and stirring was continued for 3 hours to cure the capsule wall to obtain a magnetic capsule slurry. Next, the magnetic capsule slurry was applied to a mesh filter to make the particle size uniform (250 mesh filter remaining) to prepare microcapsules for forming a magnetic recording layer.

Formation of Magnetic Display Unit A magnetic display unit 10 having a layer structure as shown in FIG. 7 was embedded in the recess for the magnetic display unit in the base. The specific stacking method of the magnetic display unit 10 is as follows. First, a predetermined amount of a primer (anchor agent) is applied to a PET film (protective layer) with a coating machine, dried, and then wound up. Next, a predetermined amount of microcapsule ink is applied to the primer surface of this PET film by a coating machine and wound in the same manner. Sumi (black) ink is further applied on the primer and the microcapsule ink. Finally, an adhesive is applied to complete the lamination.
The laminate thus obtained is cut into a predetermined size and embedded in the concave portion for the magnetic display portion to be bonded.

As described above, a sample 1 of a card-shaped magnetic display medium having an information storage section (made of an optical recording body) and a magnetic display section was prepared.

In the lower part of the magnetic display portion 10 in the sample 1, as shown in FIG. 3, 16.4 × 75.
A magnetic layer 30 made of iron and having a thickness of 6 mm and a thickness of 0.4 mm was embedded to prepare Sample 2.

An optical card R / W (manufactured by OMRON Co., Ltd., 3)
B3H-DJ-01) was subjected to a writing and reading test, the error rate was 1 × 10 ⁻⁴ or less, and there was no problem.

Predetermined optical recording was performed on these two samples 1 and 2, and information writing (recording display) and erasing tests were performed on the magnetic display section based on this information.
That is, by using a device having an information reading section and an information writing section, predetermined information recorded on the optical recording medium of the information storage section was read and information was written on the magnetic display section. Writing was performed by applying a vertical magnetic field (6500 Oe) to a predetermined position, and as a result, the magnetic powder in the capsule of the magnetic recording layer was vertically oriented and blackened at that position. When the difference in lightness between the light background and the blackened portion was measured by a color difference meter (manufactured by Suga Test Instruments Co., Ltd.), it was 14 in Sample 1.
There is a difference of 20 points between each of the points and Sample 2, and it was confirmed that blackened recording was possible in a bright background, and both were confirmed to be put to practical use. Especially, since the latter one has a magnetic layer,
It was also confirmed that the shade of the recorded display became clearer.

FIG. 10 is a plan view showing another embodiment of the magnetic display medium according to the present invention. The magnetic display medium 1 of this embodiment is intended to be diversified in use as compared with the magnetic display medium of the previous embodiment, and a card-sized base 2 as a base of the medium and a flat surface of the base 2 are provided. An information storage unit 4 formed of an incorporated optical recording body, a magnetic display unit 10 incorporated on the same surface, an IC module 5 incorporated on the same surface, and a magnetic stripe 6 incorporated on the opposite surface. Have The IC module 5 has only a memory function,
Any of those having arithmetic / processing functions can be used. In this magnetic display medium 1, an information storage unit 4 made of an optical recording body
Can store a large amount of information, and I
Information can be written and erased by the C module 5, and the magnetic stripe 6 can be made to function as an ID.

In the magnetic display medium of the present invention, either the IC module or the magnetic stripe may be provided depending on the application, and the position where these are provided is not particularly limited. In addition, it can be freely combined with additional functions such as facial photograph transfer, hologram transfer, sign panel (appropriate writing).

[0056]

As described above, the medium of the present invention is
A magnetic display medium having an information storage section and a magnetic display section on a base body, wherein the information storage section is composed of an optical recording medium capable of optical recording, and the magnetic display section floats in a liquid and in the liquid. Microcapsules containing magnetic powder sensitive to a magnetic field have a magnetic recording layer coated on a substrate, and on the magnetic recording layer of the magnetic display unit based on the information stored in the information storing unit. Since the information can be recorded and erased visually, it is possible not only to store a large amount of information in the optical recording medium of the information storage section but also to view the information content by directly looking at the medium at any time. The effect is that it can be easily visually confirmed.

Further, by providing the magnetic stripe or the IC module, it is possible to diversify the use and thus to broaden the field of application.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a magnetic display medium according to the present invention.

FIG. 2 is a plan view of the magnetic display medium shown in FIG.

FIG. 3 is a sectional view taken along line XX of FIG.

4 is a cross-sectional view of an information storage unit in the magnetic display medium shown in FIG.

FIG. 5 is an explanatory diagram showing a manufacturing process of the information storage unit.

FIG. 6 is an explanatory view showing a mother-type manufacturing process used in the manufacturing process of FIG. 5;

FIG. 7 is a cross-sectional view showing a layer structure of a magnetic display unit.

FIG. 8 is an explanatory diagram showing the behavior of the magnetic powder in the microcapsules when a vertical magnetic field is applied to the surface of the magnetic display medium.

FIG. 9 is an explanatory diagram showing the behavior of magnetic powder in microcapsules when a horizontal magnetic field is applied to the surface of the magnetic display medium.

FIG. 10 is a plan view showing another embodiment of the magnetic display medium according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic display medium 2 Base material 4 Information storage part 5 IC module 6 Magnetic stripe 10 Magnetic display part 11 Substrate 20 Magnetic recording layer 22 Microcapsules 22a Magnetic powder 22b Liquid 30 Magnetic substance layer 40 Optical recording medium

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location G06K 19/06 19/077 G11B 13/04 9075-5D G06K 19/00 K

Claims (4)

[Claims] 1. A magnetic display medium comprising an information storage section and a magnetic display section on a substrate, wherein the information storage section comprises an optical recording medium capable of optical recording, and the magnetic display section comprises a liquid and a liquid of the liquid. A magnetic recording layer having microcapsules suspended therein and containing magnetic powder sensitive to a magnetic field, the magnetic recording layer of the magnetic display unit based on the information stored in the information storage unit. A magnetic display medium characterized by being capable of recording and erasing visible information. 2. The magnetic display medium according to claim 1, wherein a magnetic layer is embedded below the magnetic recording layer. 3. The magnetic display medium according to claim 1, wherein the information storage section is embedded in a recess provided in the base body. 4. The magnetic display medium according to claim 1, wherein at least one of a magnetic stripe and an IC module is provided on the base.