KR20150063320A - Magnetism generating appatus for anti-counterfeit apparatus and anti-counterfeit system using the same - Google Patents

Magnetism generating appatus for anti-counterfeit apparatus and anti-counterfeit system using the same Download PDF

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KR20150063320A
KR20150063320A KR1020150046070A KR20150046070A KR20150063320A KR 20150063320 A KR20150063320 A KR 20150063320A KR 1020150046070 A KR1020150046070 A KR 1020150046070A KR 20150046070 A KR20150046070 A KR 20150046070A KR 20150063320 A KR20150063320 A KR 20150063320A
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magnetic field
light
forgery
containing portion
self
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KR1020150046070A
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KR101622379B1 (en
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장보승
주재현
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주식회사 나노브릭
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect
    • G02F1/091—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect based on magneto-absorption or magneto-reflection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
    • G01D15/12—Magnetic recording elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Credit Cards Or The Like (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Organic Chemistry (AREA)
  • Printing Methods (AREA)
  • Soft Magnetic Materials (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-generating device for forgery and falsification and a forgery-and-falsification prevention system using the same. The self-generating device 200 for forgery-fading prevention according to the present invention includes a magnetic field generating unit 210 for generating a magnetic field B and a magnetic field generating unit 210 for detecting the reflected or transmitted light of the forgery preventing device changing by the magnetic field B And an identification unit (220) for identifying the user.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a self-generating device for preventing forgery and falsification, and a forgery-and-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-generating device for forgery and falsification and a forgery-and-falsification prevention system using the same. More particularly, the present invention relates to a forgery-and-counterfeiting self-generating device capable of confirming whether a magnetic field generating unit is approaching or contacting a front surface of a magnetically variable material-containing portion attached to an arbitrary object, .

Various technologies have been introduced to prevent the forgery and alteration of an expensive commodity or a commodity for which the authenticity of the contents is required. Conventionally, technologies using fine patterns, braille, hologram, RFID, etc. have been used to prevent forgery and alteration of products, but such conventional technology has the limitation that it is not easy for a general user to discriminate whether or not a product is falsified or altered And it has a problem that it is expensive to manufacture and manufacture counterfeit and tamper proof means.

The present inventors have developed a device that allows a general user to easily determine whether a falsification and an object to be tampered are falsified or altered by using a substance whose color changes or light transmittance changes as a magnetic field is applied.

1 is a view showing a conventional forgery-and-falsification prevention system.

1, the forgery prevention system developed by the present inventor includes a magnetic variable material containing portion 1 including a magnetically variable material, a magnetism generating device 1 for applying a magnetic field B to the magnetically variable material containing portion 1, (Or substrate 3) to which the magnetizable material containing portion 1 and the magnetizable material containing portion 1 are attached.

1 (a), the magnetorptive substance-containing portion 1 is manufactured in the form of a film, a sticker, or the like, and can be attached to a counterpart 3 such as a document, a card, a product box or the like. When the magnetism generating device 2 is moved closer to the rear surface of the object 3, the reflected light / transmitted light L changes in the magnetic substance-containing portion 1 due to the magnetic field B, The authenticity of the product can be judged by the color change appearing on the front surface of the substance containing section 1. [

The reason why the magnetism generating device 2 is brought closer to the back surface of the object 3 than the front surface of the object 3 is that the magnetism generating device 2 is attached to the front surface (front surface of the magnetism variable substance- When the magnetic variable cell 1 is brought close to or brought into close contact with the magnetic substance B, the color of the magnetic substance-containing substance 1 changes due to the magnetic field B. In this case, the self-generating substance- It is difficult to confirm the color change.

However, as shown in FIG. 1 (b), when the thickness of the mating product 3 'is large (for example, a product having a large volume such as wine or cosmetics) There is a problem in that the magnetic field B of the self-generating device 2 is applied to the self-deformable substance-containing portion 1 at the rear surface, so that it is difficult to cause color change. Therefore, there is a problem in that it is impossible to judge whether the product is genuine or not because the unique color F is not displayed on the front surface of the magnetostatic substance containing portion 1, for example.

As a result, the magnetostrictive material containing portion 1 is attached to the mating material 3 having a small thickness so that the magnetostrictive device 2 can only approach the rear surface of the magnetostrictive material containing portion 1, There is a problem that it is difficult to easily determine the color change appearing in the front surface of the magnetically variable material containing portion 1 merely by making the magnetism generating device 2 approach the front surface of the magnet 3.

It is an object of the present invention to solve all the problems described above.

It is an object of the present invention to provide a forgery-and-fog prevention self-generating device capable of confirming authenticity of a product by approaching from the front of the self-variable substance-containing portion and a forgery-and-falsification prevention system using the same.

In addition, since the authenticity of the product can be confirmed by approaching the self-generating device for forgery-proofing from the front face of the magnetically variable material-containing portion of the present invention, the self-generating device for forgery prevention and the like, And a forgery-and-falsification prevention system.

It is another object of the present invention to provide a forgery-and-fouling self-generating device and a forgery-and-falsification prevention system using the same, which can prevent reuse by confirming authenticity of a product and curing a part of the self- do.

The above object of the present invention can be also achieved by a magnetic force generating device for forgery prevention characterized by comprising a magnetic field generating unit for generating a magnetic field and an identification unit for visually confirming reflected or transmitted light of the forgery preventing apparatus, Lt; / RTI >

The above object of the present invention is also achieved by a self-generating device for forgery prevention, characterized by comprising a pen-shaped grip portion and a magnetic field generating unit disposed at one end of the grip portion and generating a magnetic field.

The above object of the present invention can also be achieved by a self-generating forgery preventing device comprising a magnetic field generating unit for generating a magnetic field, and an identification unit for visually confirming reflected light or transmitted light of the forgery preventing apparatus, The magnetic variable material-containing portion of the forgery-inhibition prevention device includes a magnetic variable material, which includes a magnetoresistive material whose reflected light or transmitted light changes when a magnetic field applied is changed, and the magnetic field is applied to the reflected or transmitted light And a change in the number of times that the user can not see the change.

The above object of the present invention is also achieved by a self-generating apparatus for forgery prevention comprising a pen-shaped grip portion and a magnetic field generating unit disposed at one end of the grip portion and generating a magnetic field, The magnetic variable material containing portion includes a magnetically variable material whose reflected light or transmitted light changes when a magnetic field applied thereto changes, and the magnetic field is applied to confirm the change of reflected light or transmitted light of the magnetically variable material containing portion Wherein the forgery-inhibiting system comprises:

According to the present invention, there is an effect that the authenticity of the product can be confirmed by approaching the self-generating device for preventing forgery-alteration from the front face of the self-variable substance containing portion.

According to the present invention, the authenticity of the product can be confirmed by approaching the self-generating device for forgery prevention from the front face of the magnetically variable material-containing portion, so that there is no limitation on the size and thickness of the object to be protected against tampering and tampering.

According to the present invention, it is possible to confirm whether the product is genuine or not, and at the same time, it is possible to prevent reuse by hardening a part of the magnetic variable-substance containing portion.

1 is a view showing a conventional forgery-and-falsification prevention system.
2 is a diagram illustrating a principle of controlling a wavelength of light reflected from a magnetostrictive material according to an embodiment of the present invention.
FIG. 3 is a diagram showing a result of photographing a color change of a magnetostrictive material when a magnetic field of various intensities is applied according to an embodiment of the present invention.
FIG. 4 is a graph illustrating a wavelength of light reflected from a magnetoresistive material according to an intensity of a magnetic field according to an embodiment of the present invention.
FIG. 5 (a) is a SEM photograph of magnetic particles constituting a magnetostrictive material according to an embodiment of the present invention. FIG. 5 (b) is a view showing that a magnetic variable material according to an embodiment of the present invention is encapsulated into a capsule made of a light-transmitting material, and then a magnetic field is applied to reflect green light.
FIG. 6 is a view illustrating a state in which a butterfly-shaped pattern is formed on a magnetic variable material according to an embodiment of the present invention, and a magnet having alternately formed magnetic stripes in a stripe shape Fig. 5 is a photograph showing a change in the hue and pattern of the magnetostrictive material as the magnet is rotated. Fig.
7 is a diagram illustrating a configuration in which a light transmittance of a magnetostrictive material is changed according to an embodiment of the present invention.
8 to 10 are views showing a basic configuration of a forgery preventing apparatus according to various embodiments of the present invention.
11 is a view showing a self-generating device for forgery prevention according to the first embodiment of the present invention.
12 and 13 are a side view and a plan view showing a process of identifying authenticity through the forgery-inhibiting self-generating apparatus according to the first embodiment.
14 is a photograph showing a result of checking the self-deformable substance-containing portion through the self-generated device for forgery prevention according to the first embodiment.
FIG. 15 is a diagram showing a process of identifying a genuine person through the self-generated device for forgery-proof according to the second embodiment of the present invention.
FIG. 16 is a diagram showing a process of identifying a genuine person through the self-generated device for forgery-proof according to the third embodiment of the present invention.
17 is a side view and plan view showing an embodiment of a forgery preventing system for identifying authenticity through a forgery-and-alteration self-generating device of the present invention.
18 is a photograph showing the process of identifying the authenticity of FIG.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention.

[Composition of magnetic variable material]

According to an embodiment of the present invention, the particles included in the magnetorptive material may have magnetic properties such that they can be rotated or moved by receiving a magnetic force by a magnetic field. For example, nickel, iron, cobalt Co) may be included in the particles.

Also, according to one embodiment of the present invention, the particles may include a material that becomes magnetized as the magnetic field is applied, that is, magnetized. Particularly, according to an embodiment of the present invention, when an external magnetic field is applied to prevent a phenomenon of aggregation of particles having magnetism in the case where a magnetic field is not externally applied, magnetization occurs but an external magnetic field is not applied A superparamagnetic material which does not cause remnant magnetization can be used.

Also, according to one embodiment of the present invention, in order to prevent the particles from being well dispersed in the solvent and agglomerate, the surface of the particles can be coated with the charge of the same sign, The particles may be coated with a material having a different specific gravity, or a solvent may be mixed with a material having a specific gravity different from that of the grains.

Further, according to one embodiment of the present invention, the particles can be configured to reflect light of a specific wavelength, that is, to have a specific color. More specifically, the particles according to the present invention may have a specific color through controlling the oxidation water or coating such as inorganic pigment, pigment and the like. For example, Zn, Pb, Ti, Cd, Fe, As, Co, Mg, Al and the like including a chromophore may be used in the form of oxides, emulsions and lactates as inorganic pigments coated on the particles according to the present invention , A fluorescent dye, an acid dye, a basic dye, a mordant dye, a sulfide dye, a bat dye, a disperse dye, a reactive dye and the like may be used as the dye coated on the particles according to the present invention. In addition, according to an embodiment of the present invention, the particles included in the magnetic variable material may include a fluorescent material, a phosphorescent material, a quantum dot material, a temperature indicating material, an optically variable pigment (OVP) And the like.

According to an embodiment of the present invention, silica, polymer, polymer monomer, etc. may be coated on the surface of the particles so that the particles have high dispersibility and stability in a solvent.

On the other hand, the diameter of the particles according to the present invention may be several tens of nanometers to several tens of micrometers, but is not limited thereto.

Next, the constitution of the solvent included in the magnetorptive material according to the present invention will be described in detail as follows.

According to one embodiment of the present invention, the solvent may be composed of a material having a specific gravity similar to the specific gravity of the particles so that the particles can be uniformly dispersed, and is composed of a material suitable for stable dispersion of the particles in the solvent For example, halogen carbon oil having a low dielectric constant, dimethyl silicone oil, and the like.

Further, according to one embodiment of the present invention, the solvent can be configured to reflect light of a specific wavelength, that is, to have a specific color. More specifically, the solvent according to the present invention may include an inorganic pigment, a substance having a dye, or a substance having a structural color by a photonic crystal.

In addition, according to one embodiment of the present invention, by uniformly dispersing the magnetic particles in the fat-soluble solvent, it is possible to prevent the particles from clumping together or sticking to the inner wall of the capsule in the encapsulation process.

However, it is to be understood that the constitution of the particles and the solvent according to the present invention is not limited to those listed above, but can be appropriately changed within the scope of achieving the object of the present invention.

Next, the configuration of encapsulating or partitioning the particles and the solvent contained in the magnetorptive material according to the present invention will be described in detail.

According to one embodiment of the present invention, the particles may be encapsulated in a plurality of capsules made of a light-transmissive material in a dispersed state in a solvent. According to an embodiment of the present invention, it is possible to prevent direct interference such as mixing of different capsules by encapsulating the particles and the solvent, thereby controlling the particles contained in the magnetic variable material independently for each capsule As a result, it is possible to control the light transmission of a wider variety of patterns, and to make the light transmittance control property more excellent.

For example, gelatin, acacia, melamine, urea, protein, polysaccharide and the like may be used as the material constituting the capsule according to an embodiment of the present invention, and a substance (that is, a binder) . However, the constitution of the capsules according to the present invention is not necessarily limited to the above-mentioned examples, and any substance which is light-permeable, physically strong, rigid, elastic, porous and resistant to external heat and pressure, May be used as the material of the capsule.

Further, according to one embodiment of the present invention, the particles can be partitioned in a dispersed state in a solvent. According to an embodiment of the present invention, it is possible to prevent direct interference, such as mixing, between different cells divided by the partition, thereby preventing the particles included in the magnetic variable substance- And can be independently controlled.

2 is a diagram illustrating a principle of controlling the wavelength of light reflected from the magnetorptive material 10 according to an embodiment of the present invention.

According to an embodiment of the present invention, when a magnetic field is applied to a plurality of particles 11 having magnetism and having electric charges on their surfaces, magnetic particles 11 are magnetized in a predetermined direction The distance between the particles 11 shifted to one side is narrowed, and at the same time, the electric repulsive force by the Coulomb's law acts between the particles 11 (when the particles have the same surface charge) ) Physical repulsion due to the effect of steric hindrance is applied (when the hydrodynamic size of the particles is large due to the detection function attached to the surface of the particles). Accordingly, the spacing of the particles 11 can be determined according to the relative strength of the repulsion between particles due to the attractive force due to the magnetic field, and accordingly, the particles 11 arranged at predetermined intervals can function as photonic crystals . That is, according to the Bragg's law, since the wavelength of the light reflected from the particles 11 is determined by the interval of the particles 11, the wavelength of the light reflected from the particles 11 is controlled by controlling the interval of the particles 11 It can be adjusted.

Here, the pattern of the wavelength of the reflected light may be variously varied depending on factors such as the intensity and direction of the magnetic field, the size and mass of the particles, the refractive index of the particles and the solvent, the magnetization value of the particles, the charge amount of the particles, .

2, when the magnetic field is not applied, the particles 11 in the capsule 13 may be irregularly arranged. In this case, the particles 11 are not colored. Next, when a predetermined magnetic field is applied, the particles 11 can be regularly arranged at predetermined intervals while the repulsive force between the particles 11 due to attraction due to the magnetic field is balanced, It becomes possible to reflect light of a specific wavelength from a plurality of controlled particles 11. In addition, when the intensity of the magnetic field applied to the particle 11 is increased, the attractive force due to the magnetic field is also increased, so that the interval of the particles 11 becomes narrower, and the wavelength of the light reflected from the particle 11 becomes shorter. That is, according to one embodiment of the present invention, it is possible to control the wavelength of the light reflected from the particle 11 by controlling the intensity of the magnetic field applied to the particle 11. If the wavelength of the light reflected from the particles exceeds the visible light band and corresponds to the ultraviolet light band as the intensity of the magnetic field becomes larger, the particles transmit the visible light without reflecting the light, so that the light transmittance may increase.

According to an embodiment of the present invention, the magnetostrictive material composed of the particles 11 and the solvent 12, as shown in FIG. 2, may be encapsulated by a capsule 13 made of a light- have.

Meanwhile, according to one embodiment of the present invention, the solvent 12 may be a phase change solvent or a curable solvent. Herein, the phase-change solvent or the curable solvent means a solvent that reversibly or irreversibly phase-changes or cures as energy of heat energy, light energy, etc. is added or subtracted. For example, the phase change solvent or curable solvent may include a phase change material that changes from a solid state to a liquid state as the temperature rises, and a UV curable material which is cured upon irradiation with ultraviolet light.

More specifically, according to one embodiment of the present invention, the phase change solvent of the present invention may include a phase change material accompanied by a physical change process that changes from one state to another depending on the temperature change. For example, the phase change solvent of the present invention may comprise a paraffin hydrocarbon comprising a saturated hydrocarbon group. The phase change solvent of the present invention may contain paraffin stabilized using a material such as ethylene glycol (EG), diethylene glycol (DEG), polyethylene glycol (PEG), polyethylene (PE) In addition, the phase change solvent of the present invention may include a paraffin compound that is hydrophilically modified to be substituted with a carboxyl group (-COOH), an amine group (-NH X ), a sulfone group (-SH), or the like to improve solubility. In addition, the phase change solvent of the present invention may comprise a compound that is processed by a hydrate salt compound. The phase change solvent of the present invention is a high viscosity ethylene compound having a molecular weight of 1000 or more and a substance containing an ethylene group and has a high viscosity as a polymer substance at a low temperature but has a relatively low viscosity at a high temperature (40 캜 or more) And may include materials that increase in solubility for certain solutes as they increase.

In addition, according to one embodiment of the present invention, the curable solvent of the present invention may include a curable material which is accompanied by a chemical change process by irradiating light such as ultraviolet rays, visible rays, or changing the temperature. For example, the curable solvent of the present invention may include an acrylate adhesive, an acrylate monomer, an acrylate monomer radical, or the like containing a carbon double bond. In addition, the curable solvent of the present invention may include an epoxy resin containing an ether bond. In addition, the curable solvent of the present invention may include a polyurethane adhesive containing a urethane bond, a urethane monomer, or the like.

FIG. 3 is a diagram showing a result of photographing a color change of a magnetostrictive material when a magnetic field of various intensities is applied according to an embodiment of the present invention.

Referring to FIG. 3, it can be seen that the light reflected from the particles can be adjusted in all regions of the visible light wavelength range from red to green and purple by adjusting the intensity of the applied magnetic field.

FIG. 4 is a graph illustrating a wavelength of light reflected from a magnetoresistive material according to an intensity of a magnetic field according to an embodiment of the present invention. As the intensity of a magnetic field applied increases, It can be confirmed that the light is moved to the short blue light.

FIG. 5 (a) is a SEM photograph of magnetic particles constituting a magnetostrictive material according to an embodiment of the present invention. In Fig. 5, superparamagnetic Fe 3 O 4 particles between 50 and 300 nm were used as the particles.

FIG. 5 (b) is a view showing that a magnetic variable material according to an embodiment of the present invention is encapsulated into a capsule made of a light-transmitting material, and then a magnetic field is applied to reflect green light. Referring to FIG. 5 (b), it can be seen that the particles in the capsule are regularly arranged at regular intervals according to the magnetic field, and accordingly the light of the green series having a specific wavelength range is mainly reflected.

FIG. 6 is a diagram illustrating a magnet having a butterfly-like pattern formed on an upper portion of a magnetoresistive material according to an embodiment of the present invention and alternately forming magnetic stripes having different intensities at a lower portion of the magnetoresistive material in stripes , And then the color and pattern of the magnetostrictive material are changed as the magnet is rotated.

Meanwhile, according to an embodiment of the present invention, the magnetostrictive material may include particles having magnetophoretic characteristics.

Particularly, when a magnetic field is applied to the magnetoresistive material according to an embodiment of the present invention, the magnetic particles can move in the same or opposite direction to the direction of the magnetic field, A unique color can be displayed.

Meanwhile, according to one embodiment of the present invention, the magnetic variable material may include a material whose light transmittance can be changed as the magnetic field is applied.

7 is a diagram illustrating a configuration in which a light transmittance of a magnetostrictive material is changed according to an embodiment of the present invention.

7, the magnetic variable material-containing portion according to an embodiment of the present invention may include a plurality of magnetic particles 11, a solvent 12, and a capsule 13, A plurality of particles 11 having magnetic properties may be dispersed in the solvent 12. [

7 (a), when a magnetic field is not applied to the magnetically variable material-containing portion, a plurality of magnetic particles 11 may be irregularly dispersed in the capsule 13, In this case, the transmittance of the light incident on the magnetostrictive material is not particularly controlled. That is, the light incident on the magnetostrictive material is scattered or reflected by a plurality of irregularly dispersed particles 11, so that the light transmittance is relatively lowered.

Next, referring to FIG. 7 (b), when a magnetic field is applied to the magnetic variable material, the plurality of particles 11 having magnetism in the capsule 13 can be aligned in a direction parallel to the direction of the magnetic field Whereby the transmittance of the light incident on the self-deformable substance-containing portion can be controlled.

Specifically, when a magnetic field is applied to the magnetostrictive material according to an embodiment of the present invention, the direction from the south pole to the north pole of a plurality of particles 11, which are originally magnetized or magnetized by a magnetic field, Each of the plurality of particles 11 can be rotated or moved so as to be equal to the direction of the magnetic field. Since the N poles and the S poles of the respective particles 11 thus rotated are close to the S poles and the N poles of the surrounding particles 11, a magnetic attracting force or a repulsive force is applied between the plurality of particles 11 So that the plurality of particles 11 can be regularly aligned in a direction parallel to the direction of the magnetic field. That is, the plurality of particles 11 can be regularly aligned in a direction parallel to the direction of the magnetic field applied in the up-and-down direction. In this case, the light incident on the magnetically variable material is scattered by the plurality of particles 11 The degree of reflection is lowered, and accordingly, the light transmittance is relatively increased.

[Configuration of Forgery Falsification Prevention Device and Forgery Falsification Prevention System]

8 to 10 are views showing a basic configuration of a forgery preventing apparatus according to various embodiments of the present invention. Although the forgery preventing apparatus according to the following embodiments is described as being manufactured in the form of a tag, a card, a film, and a sticker, it is not necessarily limited to this form. In consideration of this aspect, the thickness of the forgery preventing apparatus according to the embodiment of the present invention may be 1 탆 to several cm.

Referring to FIG. 8 (a), the forgery inhibition apparatus of the present invention can be configured to include the magnetorheic substance-containing section 100. 8 (b), the forgery inhibition apparatus of the present invention may be configured such that the magnetorptive substance-containing portion 100 is attached to an arbitrary object 300 (or the substrate 300) .

The magnetorptive substance-containing portion 100 may include a magnetoresistive material whose reflected or transmitted light changes when an applied magnetic field B changes. Specifically, the magnetic variable material contained in the magnetorptive substance-containing portion 100 is applied with a magnetic field B having a specific intensity and direction (for convenience of explanation, in FIG. 8 to FIG. 10, (Or set) to reflect a specific wavelength of light or to exhibit a specific light transmission (L) when it is displayed (as shown below), and such a self-tunable material can be configured It can be utilized as a visual indicator in confirming authenticity of the object to be protected.

In addition, according to an embodiment of the present invention, the magnetorptive substance-containing portion 100 may be configured to be broken when the object to be tamper-proof and tamper-proof is opened, Even if a magnetic field is applied to the variable material, the reflected light or the transmitted light of the magnetically variable material is not changed, so that the magnetorptive material may not reflect light of a predetermined wavelength or may not exhibit predetermined light transmittance.

Although not shown in Figs. 8 to 10, a self-generating device (not shown) can perform the function of generating a magnetic field B that can be applied to the magnetostrictive material 10 (see Fig. 2). According to one embodiment of the present invention, a self-generating device may be formed with a predetermined pattern so that the magnetorheic material 10 exhibits a predetermined color or predetermined light transmittance according to a predetermined pattern. For example, the self-generating apparatus is provided with a pattern such as a logo, a character, a bar code, and a figure as a reference in discriminating whether or not a forgery and an anti-tampering object is to be falsified and modulated, Direction (B) of the magnetic field.

The magnetic field B generated in the magnetism generating device is applied to the magnetorheic substance-containing portion 100 and the magnetic field generated in the magnetorheological substance- (L) to reflect light of a wavelength or to exhibit a specific light transmittance.

Reference numeral 300 may be any relative object 300 such as a product, paper, card or the like to which the magnetorptive substance-containing portion 100 is attached, or may be a substrate 300 of a forgery inhibition apparatus.

According to an embodiment of the present invention, the magnetic variable material B is changed by changing the state (i.e., intensity, direction, or pattern of the magnetic field) to which the magnetic field B is applied to the magnetic variable material, (Not shown) that performs a function of changing the display state L of the display device. Here, the external stimulus applied to the moving part can be triggered by a user who wants to check whether the object to be falsified and tampered is authentic, a user who wants to open the object to be falsified and tampered, a user who wants to use the object to be falsified and tampered .

Specifically, the movable part according to an embodiment of the present invention may be moved, rotated, bent, or broken in correspondence with application of an external stimulus to the magnetic variable-containing part 100, The variable material 10 or the magnetic field generator 200 can be brought close to each other and the magnetic field B can be influenced.

Referring to FIG. 9, the forgery inhibition apparatus of the present invention may further include a light absorbing layer 400. The light absorbing layer 400 is preferably interposed between the magnetically variable material containing portion 100 and the object 300 (or the substrate 300). The light absorbing layer 400 may be a film layer having a predetermined color such as black, red, or blue. When a film layer having a predetermined color is used as the light absorbing layer 400, light that is transmitted through the magnetically variable material-containing portion 100 and reflected by the light absorbing layer 400 and light reflected from the magnetically variable material- The light is changed to overlap each other, interfere with each other, and the light L 'having improved color, visibility and the like can be displayed. In addition, since the light absorbing layer 400 absorbs a specific wavelength band, the light reflected from the light absorbing layer 400 and the light reflected from the magnetostrictive material containing portion 100 are overlapped or interfered with each other, There is also an advantage to be solved. For example, when the black film is used as the light absorbing layer 400, since the light absorbing layer 400 absorbs light of a wide wavelength band, the problem of overlapping and interference with the light reflected by the magnetically variable material- And as a result, the visibility can be greatly improved.

Referring to FIG. 10, the forgery inhibition apparatus of the present invention may further include a transparent or translucent light-transmitting layer 500. The light absorbing layer 500 is preferably interposed between the magnetically variable material containing portion 100 and the object 300 (or the substrate 300).

The light transmitting layer 500 may be formed on at least one side with a pattern 510, an image, a character, a graphic, a bar code, or the like. The pattern 510 is preferably a mark that can indicate that the object 300 is genuine. The light L 'reflected by the pattern 510 is different from the light L of the reflected wavelength band because the light L' and the pattern 510 are not formed. As a result, It is possible to confirm the shape of the pattern 510 and the like in addition to the predetermined color.

The magnetostrictive material-containing portion 100 may be formed by adjusting the magnetic permeability of the light absorbing layer 400 or the light transmitting layer 500 to adjust the intensity of the magnetic field applied to the magnetostrictive material in the magnetic field generating portion 200, The light L may be reflected or transmitted by the light emitting device.

Hereinafter, a forgery-and-falsification prevention system capable of confirming authenticity at the front side of a forgery-falsification prevention apparatus using the self-generated apparatus for forgery and falsification of the present invention will be described.

11 is a view showing a self-generated apparatus 200 for forgery-alteration according to the first embodiment of the present invention.

In the first embodiment, the forgery-and-alteration self-generator 200 is characterized in that the magnetic field B is applied from the front surface of the magnetostrictive substance-containing portion 100.

The self-generating device 200 for forgery-fading can include a magnetic field generating unit 210 for generating a magnetic field B and an identifying unit 220 for allowing the user to visually confirm the change L of the reflected or transmitted light.

The magnetic field generating unit 210 and the identifying unit 220 have a substantially cylindrical shape and may have a configuration in which the identifying unit 220 is integrally connected to the magnetic field generating unit 210. The magnetic field generating unit 210 and the identifying unit 220 may have a hollow shape and the hollow central portion of the magnetic field generating unit 210 and the identifying unit 220 may communicate with each other.

The magnetic field generating unit 210 may include a circular or oval-shaped magnet 211 having an empty center. The magnet 211 may be any known permanent magnet, electromagnet, or the like. The magnetic field (B) at the center portion and the outer portion of the magnet having a hollow center or oval shape may be different. Accordingly, when the magnetic field generating part 200 including the circular or elliptical type magnet 211 is moved closer to the magnetism variable substance containing part 100, the colors at the center part and the outside part are displayed differently. On the other hand, the magnetic field generating unit 210 may include a magnet having a polygonal shape with an empty center, provided that the magnetic field B in the center portion and the magnetic portion B in the outside portion can be applied differently.

Through the identification unit 220, the user can visually confirm the empty central portion of the magnetic field generating unit 200. In other words, it is possible to identify the portion of the magnetostrictive material containing portion 100 which is in contact with the hollow central portion of the magnetic field generating unit 210 (or the magnet 211) communicated with the identifying portion 220. The identification unit 220 may include a known lens 221, glass, or the like.

12 and 13 are a side view and a plan view showing a process of identifying authenticity through the forgery-inhibiting self-generating device 200 according to the first embodiment. FIG. 12 shows a process of forging a product, and FIG. 13 shows a process of identifying whether the genuine product is genuine.

In the case of a forgery-alteration product, first, as shown in FIG. 12A, the forgery-inhibiting self-generating device 200 can be approached on the front surface of the self-deformable substance- Subsequently, even if the self-generating device 200 for forgery-inhibiting prevention comes into contact with the front surface of the magnetically variable substance-containing portion 100 as shown in FIG. 12 (b), the color of the magnetism- , It is possible to confirm only the intrinsic color (F) of the magnetorptive substance-containing portion (100).

In the case of a genuine article, as shown in Fig. 13 (a), the forgery alteration self-generating device 200 can be approached on the front face of the magnetically variable material-containing portion 100 of the forgery inhibition device. 13 (b), when the forgery-inhibiting self-generating device 200 is brought into contact with the front surface of the magnetism-variable substance-containing portion 100, the color change (F -> And the user can confirm the reflected light or the transmitted light change L of the self-deformable substance-containing portion 100 through the lens 221 of the identification portion 200. FIG.

14 is a photograph showing a result of checking the self-deformable substance-containing portion through the self-generated device for forgery prevention according to the first embodiment. Referring to FIG. 14, it can be seen that the color difference between the empty central part and the outer part of the magnetic field generating part 200 is clear.

1 (b)], when the self-generating device 2 approaches or comes into contact with the front surface of the magnetically variable material-containing portion 1, the magnetism-generating device 2 causes self-variable It is difficult to easily confirm the color change appearing on the front surface of the magnetostrictive substance containing portion 1 and the thickness of the mating substance 3 'is thick, Since the magnetic field B of the magnetic variable material containing portion 1 is applied to the magnetism variable material containing portion 1 and hardly influences it, I could not judge the authenticity of the product.

However, in the present invention, the forgery-inhibiting self-generating device 200 is approached from the front of the magnetorptive substance-containing portion 100 and the hollow central portion of the magnetic field generating unit 210 is checked through the identification portion 220 So that the authenticity of the product can be judged.

The authenticity of the product can be confirmed by approaching the self-generating device 200 for forgery-inhibiting prevention from the front surface of the magnetorptive substance-containing portion 100, so that it is limited to the thickness of the object 300 (or the base material 300) There is no effect.

FIG. 15 is a diagram illustrating a process of identifying a genuine person through the self-generated device 250 for forgery-inhibition according to the second embodiment of the present invention.

15A, in the second embodiment, the forgery-and-alteration self-generating device 250 can apply the magnetic field B to the front surface of the magnetism-variable substance-containing portion 100, The apparatus 250 may include a grip portion 270 and a magnetic field generating unit 260 disposed at one end of the grip portion 270 to generate a magnetic field B.

The magnetic field generating unit 260 includes a magnet which is not too thick so that the magnetic field generating unit 260 can immediately observe the color change (F - > L) of the magnetorheological storage unit 100 while abutting against the magnetorheological accommodation unit 100 desirable. In addition, the magnetic field generating unit 260 only makes a point contact with the magnetically variable material containing portion 100 so that the color change (F -> L (L)) of the magnetically variable material containing portion 100 with respect to the point- It is preferable to include a magnet having strong magnetism.

The grip portion 270 preferably has a pen shape so that the magnetic field generating unit 260 can be brought into contact with the magnetism-variable substance-containing portion 100 in a state in which the grip portion 270 is easily grasped by the user.

As shown in FIG. 15 (b), the present invention includes a magnetism generating device 250 for approaching the forgery-inhibiting self-generating device 250 at the front of the magnetorptive substance-containing portion 100, (F - > L) in the portion of the containing section 100 to determine the authenticity of the product.

FIG. 16 is a view showing a process of identifying the authenticity of the self-generated device 250 'for forgery prevention according to the third embodiment of the present invention.

Referring to FIG. 16A, in the third embodiment, the self-generating device for forgery prevention 250 'has the same structure as the self-generating device for forgery prevention 250 of the second embodiment, The light emitting unit 280 may further include a light generating unit 280 that can apply light energy to the light emitting unit 100. The light generating unit 280 may be disposed at any portion of the magnetic field generating unit 260 or the grip portion 270 as long as it is an object range in which light energy can be applied to the magnetorptive substance- It is needless to say that the light generating unit 280 may be further included in the self-generated device 200 for forgery prevention according to the first embodiment shown in FIG.

The light generating unit 280 can employ any known device capable of applying light energy such as ultraviolet rays, visible rays, infrared rays, and lasers. At this time, the magnetorptive substance-containing portion 100 preferably includes a material that can be cured by light energy. In particular, it is preferable that the solvent 12 (see Fig. 2) of the magnetorptive substance 10 is a curable substance.

The present invention is characterized in that a plurality of particles 11 (see Fig. 2) of the magnetostrictive material 10 are regularly arranged at a predetermined interval by a magnetic field B applied from a magnetic field generating unit 260, And the solvent 12 of the magnetorptive substance 10 can be cured by the light energy applied from the light generating unit 280. In addition,

Referring to FIG. 16B, the forgery-inhibiting self-generating device 250 'is approached from the front side of the magnetism-variable-material-containing portion 100 so that the self- The light L of a specific wavelength can be continuously reflected in the " positive "shape portion and the intrinsic color F of the self-variable substance containing portion 100 can be displayed in the remaining portion. Therefore, the user writes on the self-variable material containing portion 100 as desired by using the self-generated device 250 'for forgery prevention and confirms the color change (F - > L) It is possible to judge whether or not the person is authentic.

In particular, it is more preferable that the magnetostrictive material containing portion 100 (or the solvent 12 of the magnetostrictive material 10) includes a material that can be irreversibly cured by light energy. When a substance which is irreversibly cured by light energy is used, the user can use the self-generated forgery-inhibiting self-generating device 250 'to permanently change the color of the portion written on the self- F - > L) remains, the reuse of the self-deformable substance-containing portion 100 can be prevented later.

17 is a side view and plan view showing an embodiment of a forgery preventing system for identifying authenticity through a forgery-and-alteration self-generating device of the present invention. In this embodiment, the self-generated device 250 for forgery and falsification uses the self-generated device 250 for counterfeiting and forgery shown in FIG. 15, and a description thereof will be omitted.

Referring to FIG. 17A, the forgery-inhibiting self-generating device 250 can approach the front surface of the magnetism-variable-material-containing portion 100 and apply the magnetic field B. The rubber magnet portion 600 having no magnetic pattern may be interposed between the magnetism variable material containing portion 100 and the mating material 300 (or the rear surface of the magnetism variable material containing portion 100). The rubber magnet portion 600 is a material that can be magnetized in a part by a magnetic force applied from the outside, and may preferably include a ferromagnetic material.

17 (a) is not yet in contact with the forgery-inhibiting self-generating device 250, the self-deformable substance-containing portion 100 of the self-deformable substance- .

17 (b), the self-generating device 250 for forgery-inhibiting prevention is approached from the front of the magnetism-variable substance-containing portion 100, and as the user writes in the " Light L of a specific wavelength can be continuously reflected, and the intrinsic color F of the self-deformable substance-containing portion 100 can be displayed in the remaining portion. Therefore, the user can write on the self-variable material containing portion 100 as desired by using the forgery-and-alteration-preventing self-generating device 250 and check the color change (F -> L) There is an effect that can be judged whether or not.

17 (c), even when the self-generating device 250 for forgery-inhibiting is separated from the magnetorptive substance-containing portion 100 so that the magnetic field B is not applied, The continuously changed color L can be displayed in the "positive" 17 (b), the portion 610 of the rubber magnet portion 600 corresponding to the portion of the self-generating device for forgery-inhibiting 250, which is brought into contact with the front surface of the magnetostatic substance containing portion 100, So that the magnetic field can be applied to the magnetorheological substance-containing portion 100. As a result, even after the magnetism generating device 250 for forgery prevention is brought into contact with the front surface of the magnetostrictive material containing section 100, > L). Therefore, there is an effect that it is possible to prevent reuse of the self-variable substance containing section 100 later.

18 is a photograph showing the process of identifying the authenticity of FIG.

18 (a), a color change (F - > L) appears at the corresponding portion in the process of writing "authentic" in the self-generating device 250 for forgery-inhibiting on the self- can confirm. As comparative examples, a rubber magnet having a magnetic pattern was arranged on the upper portions of Figs. 18 (a) and 18 (b). Since the rubber magnet portion 600 of the present invention does not have a magnetic pattern, the pattern is not displayed on the magnetorptive substance-containing portion 100.

18B, after the magnetism-generating magnetism-generating device 250 is separated from the magnetism-variable-material-containing portion 100 after completing the "authentic" writing, the magnetism- (F -> L) remains for the "normal" part written by the user.

Meanwhile, the forgery preventing system according to the present invention may further include an additional anti-falsification and anti-tamper means using at least one of hologram, RFID (radio frequency identification) and biometric information recognition. .

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

10: magnetic variable material
11: particles
12: Solvent
13: Capsules
100: magnetic variable material containing portion
200, 250, 250 ': self-generating device for forgery and forgery prevention
210, 260: magnetic field generating unit
211: magnet
220:
221: lens, glass
270: grip portion
300: arbitrary partner material, substrate
400: light absorbing layer
500: light transmitting layer
600: Rubber magnet part having no magnetic pattern
610: Some magnetized rubber magnet part
B: magnetic field
F: inherent color of self-contained material
L: Light

Claims (22)

A magnetic field generating unit for generating a magnetic field, and
An identification part for visually confirming the reflected light or the transmitted light of the forgery preventing device, which is changed by the magnetic field,
Wherein the forgery-inhibiting self-generating device comprises: The method according to claim 1,
Wherein the magnetic field generating unit includes a circle or elliptical magnet having a hollow center. The method according to claim 1,
Wherein the magnetic field generating unit includes a magnet having a polygonal shape with an empty center. The method according to claim 2 or 3,
Wherein the identification portion and the hollow center of the magnetic field generating unit are communicated with each other, and the user visually confirms the change of reflected light or transmitted light through the identification portion. A pen-shaped grip portion, and
A magnetic field generating unit which is disposed at one end of the grip portion and generates a magnetic field,
Wherein the forgery-inhibiting self-generating device comprises: 6. The method according to claim 1 or 5,
Further comprising a light generating unit capable of generating light energy. A magnetic field generating unit for generating a magnetic field, and
An identification part for visually confirming the reflected light or the transmitted light of the forgery preventing device, which is changed by the magnetic field,
Wherein the magnetism-altering material-containing portion of the forgery-inhibiting device includes a magnetism-variable material which includes a magnetoresistive material whose reflected light or transmitted light changes when a magnetic field applied thereto changes. And a change of reflected light or transmitted light of the magnetically variable material-containing portion of the forgery-fake prevention device is confirmed. 8. The method of claim 7,
Wherein the magnetic field generating unit includes a circle or an elliptical magnet having an empty center. 8. The method of claim 7,
Wherein the magnetic field generating unit includes a magnet having a polygonal shape with an empty center. 10. The method according to claim 8 or 9,
The identification portion and the hollow center of the magnetic field generating unit are communicated with each other, and the user visually confirms the change of reflected light or transmitted light through the identification portion. A pen-shaped grip portion, and
A magnetic field generating unit which is disposed at one end of the grip portion and generates a magnetic field,
The magnetism-variable substance-containing portion of the forgery-inhibition prevention device includes a magnetism-variable substance in the front face of the magnetism-altering substance-containing portion, the magnetism-variable substance-containing portion including a magnetoresistive material whose reflected light or transmitted light changes when the applied magnetic field is changed And a change of reflected light or transmitted light of the magnetically variable material-containing portion of the forgery-fake prevention device is confirmed. The method according to claim 7 or 11,
The self-generating device for forgery-
And a light generating unit capable of applying light energy to the self-variable material-containing portion. 13. The method of claim 12,
Wherein the self-tunable substance-containing portion includes a substance that can be irreversibly cured by the applied light energy. 12. The method of claim 11,
Further comprising a rubber magnet portion which does not have a magnetic pattern on the rear surface of said magnetism variable material containing portion. 15. The method of claim 14,
The portion of the rubber magnet portion corresponding to the portion of the self-generating device for forgery-inhibiting contact, which is brought into contact with the front surface of the magnetically variable material containing portion, is magnetized,
Characterized in that light reflected or transmitted through the portion of the magnetically deformable material-containing portion corresponding to the portion of the magnetized rubber magnet portion is changed even after the application of the magnetic force of the forgery-alteration-preventing magnetism-generating device is released. The method according to claim 7 or 11,
Further comprising a light absorbing layer on the rear surface of the magnetostrictive material containing portion,
And the light absorbing layer changes the light reflected or transmitted by the magnetically variable material containing portion. The method according to claim 7 or 11,
Further comprising a transparent or translucent light-transmitting layer on the rear surface of the self-tunable substance containing portion,
Characterized in that an image, a pattern, a letter, a figure or a combination thereof is formed on at least one side of the light transmitting layer to change the light reflected or transmitted through the magnetically variable material containing portion. The method according to claim 7 or 11,
Wherein the magnetostrictive material reflects light of a predetermined wavelength or transmits light with a predetermined transmittance as the magnetic field is applied. The method according to claim 7 or 11,
Wherein the forgery preventing apparatus comprises at least one of a card, a film, and a sticker. The method according to claim 7 or 11,
Wherein the magnetostrictive material includes a solution in which magnetic particles in which intervals or positions of the magnetic particles are changed in accordance with a change in an applied magnetic field. The method according to claim 7 or 11,
Wherein the magnetostrictive material comprises at least one of a fluorescent material, a phosphorescent material, a Quantum Dot material, a Temperature Indicating material and an OVP (Optically Variable Pigment) material. The method according to claim 7 or 11,
Wherein the magnetostrictive material is encapsulated into a capsule made of a light-transmitting material.
KR1020150046070A 2014-12-03 2015-04-01 Magnetism generating appatus for anti-counterfeit apparatus and anti-counterfeit system using the same KR101622379B1 (en)

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KR1020150044452A KR101689393B1 (en) 2014-12-03 2015-03-30 Apparatus for displaying photonic crystral and producing method of same
KR1020150046070A KR101622379B1 (en) 2014-12-03 2015-04-01 Magnetism generating appatus for anti-counterfeit apparatus and anti-counterfeit system using the same
KR1020150047555A KR101655374B1 (en) 2014-12-03 2015-04-03 Wireless charging identifying method and apparatus
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