KR20150063325A - Anti-counterfeit apparatus - Google Patents

Anti-counterfeit apparatus Download PDF

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KR20150063325A
KR20150063325A KR1020150055187A KR20150055187A KR20150063325A KR 20150063325 A KR20150063325 A KR 20150063325A KR 1020150055187 A KR1020150055187 A KR 1020150055187A KR 20150055187 A KR20150055187 A KR 20150055187A KR 20150063325 A KR20150063325 A KR 20150063325A
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color
variable
magnetic field
light
magnetic
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KR1020150055187A
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Korean (ko)
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KR101731623B1 (en
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장보승
이동진
주재현
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주식회사 나노브릭
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Priority to CN201510375526.2A priority Critical patent/CN106200201B/en
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    • 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
    • B42D25/369—Magnetised or magnetisable materials
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • 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
    • B42D25/391—Special inks absorbing or reflecting polarised light
    • 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)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Printing Methods (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

The present invention relates to an anti-counterfeit apparatus. According to the present invention, the anti-counterfeit apparatus comprises: a magnetic variable material including unit (100) including a magnetic variable material (10) in which reflected light or transmitted light (L) is changed if an applied magnetic field (B) is changed; a magnetic field generating unit (200) arranged at the bottom of the magnetic variable material including unit (100), and generating a magnetic field (B) to be applied to the magnetic variable material (10); and color variation units (500, 600, 700) interposed between the magnetic variable material including unit (100) and the magnetic field generating unit (200), and changing light (L1 -> L2-L7) reflected or transmitted from the magnetic variable material including unit (100) caused by external stimulus (E, P).

Description

ANTI-COUNTERFEIT APPARATUS

The present invention relates to a device for preventing forgery and falsification. More specifically, the distance between the magnetic variable-generating portion and the magnetic variable-generating portion changes, or the hue, transparency or volume of the color-changing portion itself is controlled by the external magnetic pole applied to the color- The present invention relates to a forgery proofing apparatus capable of changing reflected or transmitted light.

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 preventing apparatus.

Referring to FIG. 1, the apparatus for forgery prevention developed by the present inventor includes a magnetic variable material containing portion 1 including a magnetically variable material and an arbitrary mating material 3 [ Or a substrate 3).

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

1 is required to apply the magnetic field B to the magnetism variable material containing portion 1 through the magnetic field generating portion 2, it is not necessary to provide a separate magnetic field generating portion 2 .

When the thickness of the counterpart material 3 is slightly increased, even if the magnetic field generating section 2 approaches the back surface of the magnetostrictive substance containing section 1, the magnetic field B reaches the magnetostrictive substance containing section 1 There is a problem that it is difficult to cause the color change of the self-deformable substance-containing portion 1 to occur. When the magnetic field generating section 2 approaches the front surface of the magnetorptive substance containing section 1, the magnetic field generating section 2 is shielded from the magnetic substance generating section 2, There is a problem that it is difficult to judge whether or not.

On the other hand, even a product using a forgery-and-falsification device has a problem that the forgery preventing device itself is separated from the product and reused for counterfeit goods.

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 preventing apparatus which can immediately confirm authenticity of a product without having to include a separate magnetic field generating unit.

It is another object of the present invention to provide a forgery preventing apparatus capable of confirming authenticity of a product and preventing reuse as the color changing unit is irreversibly changed.

The above object of the present invention can be also achieved by a magnetic variable material-containing portion including a magnetoresistive material in which reflected or transmitted light is changed when an applied magnetic field is changed, a magnetoresistive material disposed in the lower portion of the magnetoresistive material- And a magnetic field generating unit for generating a magnetic field capable of generating a magnetic field capable of generating a magnetic field capable of generating a magnetic field, and a magnetic field generating unit disposed above the magnetically variable material containing unit or interposed between the magnetically variable material containing unit and the magnetic field generating unit, And a color changing portion for changing the light to be transmitted or transmitted.

According to the present invention, there is an effect that the authenticity of the product can be immediately confirmed without having to include a separate magnetic field generating unit.

According to the present invention, it is possible to confirm whether the product is genuine or not, and at the same time, the reuse can be prevented as the color variable part is irreversibly changed.

1 is a view showing a conventional forgery preventing apparatus.
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 and 9 are views showing the basic configuration of a forgery preventing apparatus according to an embodiment of the present invention.
FIGS. 10 and 11 are views showing a forgery preventing apparatus for displaying a color change by applying pressure according to an embodiment of the present invention.
12 to 16 are views showing a device for preventing forgery-fading which shows a color change by applying thermal energy and light energy according to an embodiment of the present invention.

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 the light transmittance of the magnetorptive substance 10 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 no magnetic field is applied to the magnetic variable material 10 (or the magnetically variable material-containing portion), a plurality of magnetic particles 11 are magnetically attracted to the capsule 13 ). In this case, the transmittance of the light incident on the magnetorptive substance 10 is not specifically controlled. That is, the light incident on the magnetorptive substance 10 is scattered or reflected by the irregularly dispersed plural particles 11, and accordingly, the light transmittance is relatively lowered.

Next, referring to FIG. 7 (b), when a magnetic field is applied to the magnetic variable material 10, a plurality of particles 11 having magnetism in the capsule 13 are oriented parallel to the direction of the magnetic field So that the transmittance of the light incident on the magnetically variable material containing portion can be controlled.

Specifically, when a magnetic field is applied to the magnetorptive material 10 according to an embodiment of the present invention, the S polarity of the plurality of particles 11 originally magnetized by the magnetic field or magnetized by the magnetic field, Each of the plurality of particles 11 can be rotated or moved such that the direction of the magnetic field is 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 magnetor- The scattered or reflected light is reduced, and the light transmittance is relatively increased.

[Configuration of the apparatus for preventing forgery and falsification]

8 and 9 are views showing the basic configuration of a forgery preventing apparatus according to an embodiment 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. 8A, the forgery inhibition apparatus of the present invention may be configured to include a magnetism variable material containing unit 100 and a magnetic field generating unit 200. 8 (b), the forgery inhibition apparatus of the present invention is configured such that the magnetic variable-containing section 100 and the magnetic field generation section 200 are disposed on a certain object 300 (or the substrate 300) As shown in FIG.

The magnetorptive substance-containing portion 100 may include a magnetoresistive material 10 (see FIGS. 2 and 7) in which reflected or transmitted light is changed when an applied magnetic field B changes. Specifically, the magnetic variable material 10 included in the magnetorptive substance-containing portion 100 is applied with a magnetic field B having a specific intensity and direction (for convenience of explanation, only the magnetic field B is applied (Or set) to reflect light of a particular wavelength or to exhibit a specific light transmission (L1) as shown below, and such a magnetically variable material 10 can be configured (or set) It can be utilized as a visual indicator in confirming the authenticity of the object to be tampered with.

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.

The magnetic field generator 200 includes a magnet or the like and may perform a function of generating a magnetic field B that can be applied to the magnetorptive substance 10. [ According to an embodiment of the present invention, a predetermined pattern may be formed in the magnetic field generator 200 so that the magnetorptive material 10 exhibits a predetermined color or predetermined light transmittance according to a predetermined pattern . For example, the magnetic field generating section 200 forms a pattern such as a logo, a character, a bar code, a figure or the like as a reference in discriminating whether or not a forgery and an anti-tampering object is to be falsified and modulated, (B) in the direction and direction of the magnetic field.

The magnetic field B generated by the magnetic field generating unit 200 is applied to the magnetic variable material containing unit 100 according to the distance between the magnetic field generating unit 200 and the magnetically variable material containing unit 100, It is possible to reflect light of a specific wavelength or to display a specific light transmittance in the light emitting device 100. For example, when the magnetic variable material containing portion 100 and the magnetic field generating portion 200 are brought close to each other, a strong magnetic field B is applied to the magnetic variable material containing portion 100, The interval becomes narrow, and the reflected light of blue can be displayed. On the contrary, when the magnetic variable-area containing portion 100 and the magnetic field generating portion 200 are separated from each other, a weak magnetic field B is applied to the magnetically variable material containing portion 100, And the reflected light of red can be displayed.

Reference numeral 300 denotes any relative object 300 such as a product, paper, card, or the like to which the magnetic variable-containing portion 100 and the magnetic field generating portion 200 are attached, or may be a substrate 300 of a forgery- have.

The present invention relates to a color changing unit 500, 600, 700 for changing the wavelength of light reflected or transmitted by the magnetic substance-containing portion 100 by means of external stimuli E, P (see FIGS. 10 to 15) . The color variable parts 500, 600 and 700 may be disposed on the magnetic variable material containing part 100 (refer to FIGS. 12 and 13), the magnetic variable material containing part 100 and the magnetic field generating part 200, (See Figs. 8 to 11, Figs. 14 and 15). External stimuli (E, P) should be understood as pressure (P), thermal energy (E), light energy (E), etc. applied by the user of the forgery prevention apparatus. Functions of the color variable parts 500, 600, and 700 by the external stimuli E and P will be described in detail below with reference to FIG.

Referring to FIG. 9, the forgery inhibition apparatus of the present invention may further include a light absorbing layer 400. It is preferable that the light absorbing layer 400 is interposed between the magnetic variable material containing portion 100 and the magnetic field generating portion 200. 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 superimposed on each other, interferes with each other, and the light L1 '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.

In addition, by adjusting the magnetic permeability of the light absorbing layer 400, the intensity of the magnetic field B applied to the magnetic variable material 10 in the magnetic field generating part 200 is adjusted, It is also possible to change the light L reflected or transmitted.

FIGS. 10 and 11 are diagrams showing a forgery preventing apparatus for indicating a color change by applying a pressure P according to an embodiment of the present invention.

10, the color variable portion 500 is preferably made of an elastic material. For example, the color variable portion 500 may be a natural rubber, a synthetic rubber, a sponge, a polymer, a jelly, a fiber, a styrofoam, a silicone, or the like. Thus, when the color variable portion 500 externally applies the pressure P (external stimulus), the portion can be compressed, and when the pressure P is released, the portion can be restored to the original state. That is, the thickness of the color variable portion 500 may be reversible.

Referring to FIG. 10 (a), the color variable portion 500 of the present invention may have a thickness D1 and be interposed between the magnetic variable-containing portion 100 and the magnetic field generating portion 200. The magnetic field generating unit 200 may apply the magnetic field B to the magnetostrictive material containing unit 100 through the color changing unit 500 having the thickness D1. In the magnetorptive substance-containing portion 100 having applied the magnetic field B, the reflected light or the color of transmitted light L1 corresponding to the intensity of the applied magnetic field B can be represented.

Referring to FIG. 10 (b), an external stimulus, that is, a pressure P, may be applied from the top of the magnetorptive substance-containing portion 100. The thickness of the portion where the pressure P of the color variable portion 500 is applied may be reduced from D1 to D3. The thickness of the peripheral portion to which the pressure P is applied can be continuously reduced from D1 to D2 or the like.

When the pressure P is applied and the thickness is reduced to D3, the distance between the magnetic variable material containing portion 100 of the portion and the magnetic field generating portion 200 can also be reduced to D3. It is a matter of course that the distance between the magnetic variable material containing portion 100 and the magnetic field generating portion 200 in the peripheral portion where the pressure P is applied is also reduced to D2.

Since the intensity of the magnetic field applied to the magnetostrictive material-containing portion 100 at the portion where the pressure P is applied is also increased from B1 to B3, the light reflected or transmitted by the magnetostrictive material- - > L3). It is a matter of course that the change in the luminous intensity (L1 - > L2) reflected or transmitted by the magnetostrictive substance-containing portion 100 in the peripheral portion where the pressure P is applied is natural.

When the applied pressure P is released, the thickness of the color variable portion 500 of elastic material is restored to the original state D1, and the distance between the magnetically variable material containing portion 100 and the magnetic field generating portion 200 is also D1 Can be returned. Therefore, the light L1 reflected or transmitted by the magnetorptive substance-containing portion 100 can also be returned to the original state.

As described above, according to the present invention, there is no need to separately provide the magnetic field generating unit 200, and even if the user applies the pressure P to the color changing unit 500, the user can immediately check whether the product is genuine or not.

11, the color variable portion 500 is preferably made of a non-elastic material. For example, the color changing portion 500 may be an air cap, an empty glass or plastic, glass or plastic including a plurality of unit cells in which the interior is empty, clay, and the like. Thus, when the color changing portion 500 externally applies the pressure P, the portion can be compressed, and even when the pressure P is released, the portion can still maintain the compressed state 500 ' . That is, the thickness of the color variable portion 500 can be irreversibly fixed. The irreversible fixing may include a state in which the portion to which the pressure P is applied is compressed and not expanded, and a state in which the portion to which the pressure P is applied is broken.

11A, when a pressure P is applied to a part of the color variable portion 500 having the thickness D1, the pressure P is applied to a portion 550 of the color variable portion 500 to which the pressure P is applied. The thickness can be reduced to D3. The distance between the magnetic variable material containing portion 100 of the portion 550 and the magnetic field generating portion 200 can be reduced to D3 and the intensity of the applied magnetic field is also increased from B1 to B3, The light reflected or transmitted by the magnetorptive substance-containing portion 100 may be changed (L1 -> L3). 11 (a) shows a color changing portion 500 having partition walls 560 formed of a plurality of unit cells.

Referring to FIG. 11 (b), even if the pressure P is released, the unit cell corresponding to the portion 550 to which the pressure P has already been applied may be compressed and not expanded or broken. For example, when the air cap constituting one unit cell 550 of the air cap composed of a plurality of unit cells is blown by the pressure P and is broken, even if the pressure P is released, D3 to D1. Therefore, even when the pressure P is not applied, the light reflected or transmitted by the magnetostrictive material-containing portion 100 corresponding to the broken portion 550 of the color variable portion 500 ' . Therefore, the forgery preventing device, which has been confirmed to be authentic with one time by applying the pressure P, is damaged and can not be reused.

12 to 16 are views showing a device for preventing forgery-fading which shows a color change by applying thermal energy and light energy according to an embodiment of the present invention.

12 and 13, the color variable portion 600 may be disposed on the upper portion of the magnetorptive substance-containing portion 100.

It is preferable that the transparency of the color variable portion 600 is controlled by the external stimulus E. The external stimulus E may be at least one of thermal energy and light energy. The color variable portion 600 may include at least one of a temperature-indicating dye and a UV-sensitive dye so that the transparency can be controlled by the thermal energy E and the light energy E. In addition, in the range of the purpose of adjusting the transparency of the color variable portion 600, any known material whose transparency can be controlled by thermal energy or light energy can be employed without limitation.

Referring to FIG. 12 (a), reflected or transmitted light of L1 may be generated in the magnetic variable-containing portion 100 by the magnetic field B applied by the magnetic field generating portion 200. When the color variable portion 600 is an opaque or semitransparent thin film, the inherent color of the color variable portion 600 overlaps and interferes with L1 of the magnetostrictive material containing portion 100, so that the user can identify the light of L4 .

12 (b), when an external stimulus E is applied to a portion 610 of the color variable portion 600, a portion 610 of the color variable portion 600 'is in a transparent state, Portion 620 may remain opaque or translucent. Thus, as the user identifies the light of L1 through the portion 610 of the color changing portion 600 to which the external stimulus E is applied and identifies the light of L4 in the remaining portion 620, It can be judged.

13A and 13B, the basic components are the same as those of the forgery preventing apparatus described with reference to FIG. 12, except that at least one surface of the color changer 600 is an image, a pattern, a letter, , Pattern 650] may be formed. Even if the pattern 650 is formed, if the color-changing unit 600 is opaque, the user can identify the light of L4.

Referring to FIG. 13B, when an external stimulus E is applied to a portion 610 of the color variable portion 600, a portion 610 of the color variable portion 600 'is in a transparent state, Portion 620 may remain opaque or translucent. Thus, the user can identify the light of L1 through the portion where the pattern 650 is not formed in the portion 610 of the color variable portion 600 to which the external stimulus E is applied, The L1 influenced by the pattern 650 changes, and as a result, the user can identify the light of L5. Of course, in the remaining portion 620, the user can identify the light of L4. Accordingly, the user can judge whether the product is genuine or not by identifying the light of L5 corresponding to the pattern 650 in addition to the color classification of L1 and L4.

12 and 13 may be irreversibly changed by the external stimulus E, as shown in FIG. For example, even after the external stimulus E is released, the portion 610 of the color variable portion 600 'is released even after the external stimulus E is released after the portion 610 of the color variable portion 600' ) Can still remain transparent, without returning to an opaque or translucent state. Therefore, the forgery-and-fog prevention device which discriminates the authenticity by applying heat energy and light energy E is advantageous in that it is damaged and can not be reused.

Referring to FIGS. 14 and 15, the color variable portion 700 may be interposed between the magnetic variable-containing portion 100 and the magnetic field generating portion 200. The color changing portion 700 can perform the same function (visibility enhancement) as the light absorbing layer 400 described in Fig. It is preferable that the color variable portion 700 is adjusted in color by the external stimulus E. The external stimulus E may be at least one of thermal energy and light energy. The color variable portion 700 may include at least one of a temperature-indicating dye and a UV-sensitive dye so that the color can be controlled by thermal energy E and light energy E. In addition, in the range of the purpose of adjusting the hue of the color variable portion 700, a known material whose transparency can be controlled by thermal energy or light energy can be employed without limitation.

Referring to FIG. 14 (a), reflected or transmitted light may be generated in the magnetic variable substance-containing portion 100 by the magnetic field B applied by the magnetic field generating portion 200. When the color variable portion 700 is a black sheet, the black color of the color variable portion 700 overlaps or interferes with the reflected light or transmitted light of the magnetostable material containing portion 100, It is possible to identify the light of

14 (b), when an external stimulus E is applied to a portion 710 of the color variable portion 700, a portion 710 of the color variable portion 700 ' Gray, etc., and the remaining portion 720 may be black. Thus, through the portion 710 of the color variable portion 700 to which the external stimulus E is applied, the user identifies the light of L6 formed by overlapping and interfering with white or gray, etc., By identifying the light of L1, the authenticity of the product can be judged.

14A and 14B are the same as those of the forgery preventing apparatus described with reference to FIG. 14 except that an image, a pattern, a letter, a graphic or a combination thereof (hereinafter referred to as " , Pattern 750] may be formed. Even if the pattern 750 is formed, if the color variable portion 700 is black, the user can identify the light of L1.

15 (b), when an external stimulus E is applied to a portion 710 of the color variable portion 700, a portion 710 of the color variable portion 700 'becomes thin and white or gray And the remaining portion 720 can be kept black. Thus, through the portion where the pattern 750 is not formed in the portion 710 of the color variable portion 700 to which the external stimulus E is applied, the user can easily recognize that the light L6 of the L6 formed by overlapping or interfering with white, And the L1 affected by the pattern 750 is changed through the portion where the pattern 750 is formed so that the user can identify the light of L7 as a result. Of course, in the remaining portion 720, the user can identify the light of L1. Accordingly, the user can judge whether the product is genuine or not by identifying the light of L7 corresponding to the pattern 750 in addition to the color classification of L1 and L6.

14 and FIG. 15 may be irreversibly changed by the external stimulus E, as shown in FIG. For example, even after a part 710 of the color variable part 700 'becomes white or gray by the external stimulus E and then the external stimulus E is released, a part of the color variable part 700' The light source 710 does not return to black, and can still maintain white or gray. Therefore, the forgery-and-fog prevention device which discriminates the authenticity by applying heat energy and light energy E is advantageous in that it is damaged and can not be reused.

Referring to FIG. 16, the color variable portion 800 may be interposed between the magnetic variable material containing portion 100 and the magnetic field generating portion 200. It is preferable that either the volume or the thickness is controlled by the external stimulus E in the color variable portion 800. The external stimulus E may be at least one of thermal energy and light energy. The color changing portion 800 can adopt, without limitation, any known substance whose volume and thickness can be adjusted by the external stimulus E.

Referring to FIG. 16A, the color variable portion 800 of the present invention may have a thickness D1 and be interposed between the magnetic variable-containing portion 100 and the magnetic field generating portion 200. The magnetic field generating unit 200 may apply the magnetic field B to the magnetostrictive material containing unit 100 through the color changing unit 800 having the thickness D1. In the magnetorptive substance-containing portion 100 having applied the magnetic field B, the reflected light or the color of transmitted light L1 corresponding to the intensity of the applied magnetic field B can be represented.

16 (b), when an external stimulus E is applied to a portion 810 of the color variable portion 800, the volume and thickness of the color variable portion 810 to which the external stimulus E is applied vary . When the volume of the color variable portion 810 to which the external stimulus E is applied is increased or the thickness is increased, the distance between the magnetism-variable portion 100 and the magnetic field generating portion 200 may be increased from D1 to D4.

Since the intensity of the magnetic field applied to the magnetoresistive material-containing portion 100 in the magnetic field generator 200 is weakened by B1 to B4, the light reflected or transmitted through the magnetoresistive material- > L8). If the magnetic field is not applied to the magnetostrictive material-containing portion 100 at all, the magnetostrictive material-containing portion 100 may exhibit the intrinsic color (F).

The volume and thickness of the color variable portion 800 are restored to the original state D1 and the distance between the magnetic variable material containing portion 100 and the magnetic field generating portion 200 is D1, Can be returned. Therefore, the light L1 reflected or transmitted by the magnetorptive substance-containing portion 100 can also be returned to the original state.

On the other hand, the color variable portion 800 may be irreversibly changed by the external stimulus E. The volume and thickness of the color variable portion 810 do not become D1 even after the external stimulus E is released after the volume and thickness of the color variable portion 810 become D4 by the external stimulus E You can still maintain D4. Therefore, the forgery-and-fog prevention device which discriminates the authenticity by applying heat energy and light energy E is advantageous in that it is damaged and can not be reused.

Meanwhile, the forgery inhibition apparatus according to the present invention may further include an additional forgery preventing means using at least one of a hologram, an RFID (Radio Frequency IDentification), and a biometric information recognition, thereby further enhancing the effect of forgery- .

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: Forgery and falsification magnetic field generator
300: arbitrary partner material, substrate
400: light absorbing layer
500, 600, 700: color variable portion
B: magnetic field
E: external stimulus, heat energy, light energy
L, L1-L7: Light
P: external stimulus, pressure

Claims (17)

A magnetoresistive material-containing portion including a magnetoresistive material whose reflected or transmitted light changes when an applied magnetic field changes,
A magnetic field generating unit disposed below the magnetic variable material containing unit to generate a magnetic field that can be applied to the magnetically variable material,
A color variable portion which is disposed on the magnetic variable material containing portion or which is interposed between the magnetic variable material containing portion and the magnetic field generating portion and changes reflected light or transmitted light of the magnetically variable material containing portion by an external stimulus,
And forgery prevention apparatuses. The method according to claim 1,
Wherein the external stimulus is a pressure applied to at least a part of the color variable portion. 3. The method of claim 2,
Wherein the distance between the magnetic variable area containing portion and the magnetic variable area containing portion is changed so that reflected light or transmitted light of the magnetically variable material containing portion is changed in the portion of the color changing portion where the pressure is applied. The method of claim 3,
Wherein the color changing portion is made of an elastic material and the thickness of the color changing portion is reversibly changed with respect to the pressure. The method of claim 3,
Wherein the color changing portion is made of a non-elastic material, and the thickness of the color changing portion is irreversibly fixed with respect to the pressure. 6. The method of claim 5,
Wherein the color variable portion includes at least one of an air cap, glass or plastic with an empty interior, and glass or plastic including a plurality of unit cells with an empty interior. The method according to claim 6,
Wherein the pressure-applied portion of the color-changing portion is broken. The method according to claim 1,
Wherein the external stimulus is at least one of heat energy and light energy applied to at least a part of the color changing part. 9. The method of claim 8,
Wherein the color variable portion includes at least one of a temperature-indicating dye and a UV-sensitive dye. 10. The method of claim 9,
Wherein the color changing unit changes the reflected light or the transmitted light of the magnetic variable material containing unit as the hue or transparency is controlled by the external magnetic pole. 11. The method of claim 10,
Wherein the part of the color changeable part whose color or transparency is adjusted by the external stimulus maintains the adjusted color or transparency even after the external stimulus is released. 11. The method of claim 10,
Wherein an image, a pattern, a letter, a graphic or a combination thereof is formed on at least one surface of the color variable portion to change reflected light or transmitted light of the magnetically variable material containing portion. 9. The method of claim 8,
Wherein the color changing unit changes the reflected light or the transmitted light of the magnetic variable-material containing unit as one of volume and thickness changes by the external magnetic pole. 14. The method of claim 13,
Wherein the intensity of the magnetic field applied to the magnetically variable material-containing portion in the magnetic field generating portion is weakened when the volume of the color variable portion becomes large or becomes thick. The method according to claim 1,
Wherein the magnetic variable 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 1,
Wherein the forgery preventing apparatus comprises at least one of a card, a film, and a sticker. The method according to claim 1,
Wherein the magnetism-variable material is encapsulated into a capsule made of a light-transmitting material.
KR1020150055187A 2014-12-03 2015-04-20 Anti-counterfeit apparatus KR101731623B1 (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
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