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CN113759622A - Anti-counterfeiting changing device comprising piezochromic fluorescent layer - Google Patents

Anti-counterfeiting changing device comprising piezochromic fluorescent layer Download PDF

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Publication number
CN113759622A
CN113759622A CN202110578378.XA CN202110578378A CN113759622A CN 113759622 A CN113759622 A CN 113759622A CN 202110578378 A CN202110578378 A CN 202110578378A CN 113759622 A CN113759622 A CN 113759622A
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China
Prior art keywords
piezochromic
counterfeiting
layer
tamper
present
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Granted
Application number
CN202110578378.XA
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Chinese (zh)
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CN113759622B (en
Inventor
李仁淑
金光昊
曹仁锡
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Xinwei Zhifang Co ltd
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Xinwei Zhifang Co ltd
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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
    • B42D25/378—Special inks
    • B42D25/391—Special inks absorbing or reflecting polarised light
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13718—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13731—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition
    • G02F1/13737—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition in liquid crystals doped with a pleochroic dye
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13762—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 liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering containing luminescent or electroluminescent additives

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Credit Cards Or The Like (AREA)
  • Polarising Elements (AREA)
  • Printing Methods (AREA)

Abstract

The invention provides an anti-counterfeiting and changing device comprising a piezochromic fluorescent layer, which comprises: a substrate; a design printing layer which is positioned on the upper side of the base material and is printed with a specific pattern; the cholesteric liquid crystal display layer is positioned on the upper part of the design printing layer and is printed with a hidden pattern; and the piezochromic fluorescent layer is positioned on the upper part of the cholesteric liquid crystal display layer. The anti-counterfeiting modification device has the advantages that when light of a smart phone is irradiated on the anti-counterfeiting modification device, or pressure is applied on the anti-counterfeiting modification device to confirm whether the anti-counterfeiting modification device is modified or not, the anti-counterfeiting modification device is extremely difficult to modify, the manufacture is simple and convenient, the manufacture cost is low, and the anti-counterfeiting modification device can be used for identifying the counterfeiting modification without other anti-counterfeiting modification confirmation devices except the smart phone.

Description

Anti-counterfeiting changing device comprising piezochromic fluorescent layer
[ technical field ] A method for producing a semiconductor device
The invention relates to an anti-counterfeiting modification device comprising a piezochromic fluorescent layer, in particular to an anti-counterfeiting modification device comprising a base material, a design printing layer positioned on the upper side of the base material and a piezochromic fluorescent layer positioned on the upper part of the design printing layer.
[ background of the invention ]
Various techniques have been introduced to prevent counterfeit and alteration of high-grade goods or articles with authenticity assurance. In the past, technologies such as fine patterns, braille, holograms, RFID and the like are mainly used for preventing the counterfeiting and the alteration of commodities, but the technology still has the problems that the limitation that whether the commodities are counterfeited or altered is difficult to identify for common users, or the cost required for manufacturing anti-counterfeiting alteration means is too high.
The anti-counterfeiting alteration technology should preferably consider the technology (overlay) which is easily identified by the naked eye of the ordinary consumer, but with the gradual development of the copy technology, a security technology which applies the anti-counterfeiting alteration technology in a hidden form (overlay) and can be identified doubly when a fake alteration product is found is required from the standpoints of manufacturers and suppliers.
The anti-counterfeiting modification hiding technology at home and abroad basically adopts infrared and ultraviolet luminescent materials, but most of the anti-counterfeiting modification hiding technology only can show one color change after being coated with ink, and the technology is not difficult, so that the possibility of false modification still exists.
Today, interest in techniques that can modulate fluorescence on solids is increasing. Among them is a technique called Piezochromic fluorescence (piezo fluorescence). When the fluorescent material is subjected to pressure or physical force, secondary bonding force between molecules such as pi-pi interaction of a chemical structure of the material or hydrogen bonding (hydrogen bonding) and van der Waals force (van der Waals force) is changed, so that fluorescent color or intensity is changed, and further, the fluorescence is restored again through heat treatment and the like.
In short, hydrogen bonds are strongly held in the crystal emitting red fluorescence, but when pressure is applied from the outside, the hydrogen bonds are broken, the molecular stacking structure is changed, and the crystal emits green fluorescence. Depending on the inherent structural properties of the molecule, the wavelength can be shifted to shorter or longer wavelengths as pressure is applied. The pressure here means applying a certain force to the face, line, point.
According to the related patent documents of forgery-preventing alteration devices comprising a piezochromic fluorescent layer, it is disclosed in KR patent application No. 10-2015-7018809 (title of the invention: composition for credit document and security document using the same), which is in the form of liquid or paint before drying, preferably a composition for credit document comprising a matrix colorless printing matrix and a reversible mechanoluminescent compound of the following chemical formula A.
Chemical formula A
Figure BDA0003085278220000021
KR patent application No. 10-2012 and 0092319 (title of the invention: optical element for security document) comprises a fluorescent substance layer; and an optical element for security element of security document, in which a photonic crystal layer having a photonic band gap is laminated on the phosphor layer.
However, the above patent documents have the advantage that it is difficult to falsely modify a printed matter, but also have problems such as complicated manufacturing method of the printed matter and excessive manufacturing cost.
Throughout this specification, reference is made to a number of papers and patent documents, the contents of which are hereby incorporated by reference. The disclosures of the cited articles and patent documents are incorporated in their entirety into this specification by reference for further clarity in describing the state of the art to which this invention pertains and the contents of this invention.
[ summary of the invention ]
[ problem ] to provide a method for producing a semiconductor device
The present invention has made diligent efforts to develop a forgery prevention device that is difficult to counterfeit, simple and convenient to manufacture, low in manufacturing cost, and can discriminate forgery without providing any other forgery confirmation device. As a result, the present inventors have found that, when a light on a smartphone interface is irradiated on a forgery prevention modification device including a base material, a design print layer on the base material, and a color-changeable fluorescent layer on the design print layer, or a pressure is applied to the forgery prevention modification device to confirm forgery, the forgery prevention modification device is difficult, the production is simple, the production cost is low, and the forgery prevention modification device can be distinguished without providing a forgery prevention confirmation device other than a smartphone, and have completed the present invention.
It is therefore an object of the present invention to provide a tamper-proof modification device comprising a piezochromic fluorescent layer.
Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, the scope of the claims and the accompanying drawings.
[ technical solution ] A
The invention provides an anti-counterfeiting modification device.
The present invention has made diligent efforts to develop an anti-counterfeit device that is difficult to counterfeit, simple and convenient to manufacture, low in manufacturing cost, and can discriminate counterfeit without other counterfeit confirmation devices. As a result, it has been found that, when a light on a smartphone interface is irradiated to a forgery prevention modification device including a base material, a design print layer on the base material, and a color-changeable fluorescent layer on the design print layer, or a pressure is applied to the forgery prevention modification device to confirm forgery, the forgery prevention modification device is difficult to make, the production is easy, the production cost is low, and the forgery prevention modification device can be distinguished without providing a forgery prevention confirmation device other than the smartphone.
According to one embodiment of the present invention, there is provided a substrate comprising a substrate; a design printing layer which is positioned on the upper side of the base material and is printed with a specific pattern; and the anti-counterfeiting and anti-counterfeiting device is positioned on the upper part of the cholesteric liquid crystal display layer and presses the color-changing fluorescent layer.
According to another embodiment of the present invention, a cholesteric liquid crystal display layer printed with a concealing pattern may be further included on the design printing layer according to the use.
The term "piezochromic fluorescence" as used herein refers to any substance that changes its original fluorescence wavelength when physical pressure is applied.
The term "polarizing substance" used in the present specification means any substance that can detect a specific color, pattern, or change in color and pattern by irradiating polarized light to the substance and comparing the state with the state without irradiating polarized light.
According to a preferred embodiment of the present invention, said piezochromic fluorescent layer of the present invention preferably comprises a piezochromic fluorescent material.
According to a preferred embodiment of the present invention, said piezochromic fluorescent layer of the present invention preferably comprises: piezochromic fluorescent materials having a pi-conjugated system.
According to a preferred embodiment of the present invention, the piezochromic fluorescent material having a pi-conjugated system of the present invention preferably has more than one pi-system, i.e., benzene ring, bound to both sides of the basic skeleton, having at least one Electron Donor (EDG) and electron acceptor (EWG), respectively.
According to a preferred embodiment of the present invention, the basic skeleton of the present invention is preferably selected from the group consisting of fluorine (fluoroene), carbazole (carbazole), dithienothioole (dithienosilole) and anthracene (anthracene).
According to a preferred embodiment of the present invention, the electron donor of the present invention is preferably selected from the group consisting of alkylamino (alkyl amine group), arylamino (aryl amino group), arylamide (alkyl amide group) and a mixture thereof.
According to a preferred embodiment of the present invention, the electron acceptor of the present invention is preferably selected from the group consisting of cyano (cyano group), nitro (nitro group), fluoroalkyl (fluoroalkyl group) containing more than one carbon, and a mixture thereof.
According to a preferred embodiment of the present invention, the piezochromic fluorescent material of the present invention preferably comprises 0.01 to 5.0% by weight of the piezochromic fluorescent layer.
When the weight standard of the piezochromic fluorescent material is below 0.01%, the piezochromic fluorescent effect is very little, and when the weight standard of the piezochromic fluorescent material is above 5.0%, the problem of reduced transparency exists.
According to a preferred embodiment of the present invention, the piezochromic fluorescent material of the present invention preferably comprises the following features: (a) average particle size: 10-150 nm; (b) fluorescence wavelength: 450 to 650 nm.
According to a preferred embodiment of the present invention, said piezochromic fluorescent layer of the present invention preferably comprises the following features: (a) visible light transmittance: 75-95%; (b) piezochromic thickness: 1-100 μm: and (c) pressing pressure: 4B or more.
Here, the pressure applied to the authentication means is a value based on the pencil hardness. The method for measuring the pressure intensity is various, but the method for applying pressure by using a pen point/pencil point or the method for measuring the pressure by pressing by hand is convenient to be used as a means for certified products without the help of special instruments, so the pencil hardness is used as a standard. In the present invention, the display color changes when a pressure corresponding to the 4B pencil hardness value is applied.
According to a preferred embodiment of the present invention, said piezochromic fluorescent layer of the present invention preferably comprises a conductive polymer. The conductive polymer can help the electrons between the piezochromic fluorescent materials move in the piezochromic fluorescent material, and the electrons move more quickly, so that the visibility when being pressed becomes high.
The conductive polymer is preferably selected from the group consisting of poly (phenylene), polypyrrole, polycarbazole, polyindole, poly (3,4-ethylenedioxythiophene) [ poly (3,4-ethylenedioxythiophene), from the viewpoint of flexibility; PEDOT ].
According to a preferred embodiment of the invention, the cholesteric liquid crystal display layer, which the invention may also comprise, preferably comprises a first display layer and a second display layer, one or more of which are printed with an ink comprising cholesteric liquid crystal
According to a preferred embodiment of the present invention, the first display layer and the second display layer of the present invention may preferably be printed with the same color.
According to a preferred embodiment of the present invention, the first display layer and the second display layer are printed with inks containing cholesteric liquid crystals, respectively, each having a different orientation from each other.
According to a preferred embodiment of the present invention, the ink comprising cholesteric liquid crystal of the present invention preferably contains 5 to 50% cholesteric liquid crystal by weight of the ink.
According to a preferred embodiment of the present invention, the ink containing cholesteric liquid crystal of the present invention may preferably include an oily solvent and an organic polymer.
According to a preferred embodiment of the present invention, the oily solvent of the present invention is preferably an oily solvent selected from the group consisting of N-methylpyrrolidone (N-methylpyrrolidone), methyl ethyl ketone (methylethylketone), toluene (tolumene), cyclohexanone (cyclohexoxanone), and a group comprising these mixtures.
According to a preferred embodiment of the present invention, said organic polymer of the present invention is preferably selected from the group consisting of polyurethane (polyurethane) based polymers, polyvinyl alcohol (polyvinyl alcohol) based polymers, polyacrylic acid (polyacrylic) based polymers and mixtures comprising these.
According to a preferred embodiment of the invention, the thickness of said cholesteric liquid crystal display layer of the invention is preferably 1-15 μm.
According to a preferred embodiment of the invention, said cholesteric liquid crystal of the invention is preferably mixed with a complementary color fluorescent dye or a nematic liquid crystal.
The cholesteric liquid crystal of the present invention is a very important structure in which a complementary color fluorescent dye or a nematic liquid crystal is mixed. The color of the cholesteric liquid crystal can be different from the color of the liquid crystal after verification by adding complementary fluorescent dye, and the color of the liquid crystal after verification can be different by mixing nematic liquid crystal in the cholesteric liquid crystal and adjusting the polarization orientation angle.
According to a preferred embodiment of the present invention, the upper portion of the display layer of the present invention may further include an adhesive layer and an extension film layer.
According to a preferred embodiment of the present invention, there is provided a forgery-preventing alteration medium including a polarizing substance and a piezochromic fluorescent substance, the forgery-preventing alteration medium having printed thereon a specific pattern that can discriminate whether or not a forgery is made, the forgery is made or not by a method of 1) irradiating a forgery-preventing alteration medium with a forgery-preventing alteration confirming device that can irradiate polarized light; 2) a method for confirming with a polarizing film and 3) a forgery prevention alteration device including a polarizing substance for confirming by a method for applying a pressure to a forgery prevention alteration medium.
According to the preferred embodiment of the present invention, the anti-counterfeiting changing medium of the present invention is preferably a label, sticker, packaging material or paint.
According to a preferred embodiment of the present invention, the specific pattern of the present invention, which can distinguish whether or not the false alteration is made, is preferably a barcode or a QR code, and most preferably a QR code.
The most preferred specific pattern in the present invention, which can distinguish whether the false alteration or not, is a QR code, which is a very important structure. Because the specific pattern is a QR code, the interface of the smart phone and the like can be easily switched into a special interface capable of identifying whether the fake is changed or not, and whether the fake is changed or not can be confirmed at one time through the identification of the QR code.
According to the preferred embodiment of the present invention, it is preferable that other identification patterns that can be identified by polarized light emitted from an interface of a smart phone or the like be printed in the specific pattern of the present invention.
In the present invention, it is very important to print different recognition patterns recognizable by polarized light generated by an interface such as a smart phone on the specific pattern. Since the specific pattern is printed with another identification pattern that can be identified by polarized light emitted from an interface such as a smartphone, a means for confirming whether or not the specific pattern is altered by a fake can be provided in addition to the QR code.
According to a preferred embodiment of the present invention, the pseudo-alteration confirmation apparatus of the present invention is preferably selected from the group consisting of a smart phone, a tablet computer, a monitor, and a liquid crystal display, further preferably a smart phone or a tablet computer, and most preferably a smart phone.
The most preferable pseudo alteration confirming device in the present invention is a very important structure of a smart phone. Since the QR code can be easily photographed using a camera mounted on a smart phone using the smart phone, polarized light can be sufficiently generated on a liquid crystal interface, and whether or not a counterfeit is changed can be easily confirmed using a dedicated interface for confirming whether or not a counterfeit is changed, which is small in size.
According to a preferred embodiment of the present invention, the counterfeit deterrent device of the present invention is preferably configured to irradiate the counterfeit deterrent medium with light emitted from an interface portion of a counterfeit deterrent device selected from the group consisting of the smartphone, the tablet computer, the display, and the liquid crystal display.
In the present invention, it is an important structure to confirm the light of polarization emitted from the interface portion irradiated to the forgery prevention alteration medium by using the interface portion of the forgery prevention alteration confirmation apparatus, i.e., the smartphone. Because the color and/or pattern of the identification pattern are changed in the process that the polarized light emitted by the interface part of the smart phone is transmitted through the polarizing material contained in the anti-counterfeiting changing medium or is reflected, the identification pattern can be identified by naked eyes.
According to a preferred embodiment of the present invention, in the interface portion of the present invention, the single-color background occupies 70% or more of the area of the interface portion.
According to a preferred embodiment of the present invention, said single color of the present invention is preferably selected from the group consisting of white, gray, ivory, yellow, blue and light green, further preferably white or ivory, most preferably white.
It is important in the present invention that the most preferred single color is white. Since polarized light is irradiated to the identification pattern using a white interface, the sharpness of the identification pattern is significantly improved compared to when polarized light is irradiated using other color interfaces.
According to a preferred embodiment of the present invention, the anti-counterfeiting alteration medium containing the polarizing substance of the present invention preferably comprises: the printing layer is printed by using ink with the same color or the same appearance at a glance, and one ink uses cholesteric liquid crystal ink, and the other ink uses cholesteric liquid crystal ink with different directions from the cholesteric liquid crystal ink.
According to a preferred embodiment of the present invention, the specific pattern of the present invention is preferably a QR code pattern, and the QR code is recognized by the smartphone or the tablet computer, and the interface portion of the smartphone or the tablet computer is switched to a dedicated interface in which the printed layer printed with the polarizing material can be confirmed.
[ PROBLEMS ] the present invention
The invention has the following characteristics and beneficial effects:
(a) the present invention provides a composition comprising a substrate; a design printing layer which is positioned on the upper side of the base material and is printed with a specific pattern; the anti-counterfeiting and anti-counterfeiting device is positioned on the design printing layer and presses the color-changing fluorescent layer;
(b) when the anti-counterfeiting modification device of the invention is irradiated with light of a smart phone interface or pressure is applied to the anti-counterfeiting modification device to confirm whether the anti-counterfeiting modification device is false or not, the anti-counterfeiting modification device is very difficult to falsely modify, is simple and convenient to manufacture, has low manufacturing cost, and can distinguish the counterfeiting modification without other anti-counterfeiting modification confirmation devices except the smart phone.
[ description of the drawings ]
FIG. 1 is a cross-section showing a tamper-resistant modification device of the present invention;
FIG. 2 is a diagram showing a state of confirming whether or not a fake is made using a smartphone interface and a polarizing film;
FIG. 3 is a cross-section showing a state of confirming whether or not a false alteration is made by a UV lamp and applying pressure;
fig. 4 is a front view showing a state of confirming whether or not a false alteration is made by a UV lamp and applying pressure;
FIG. 5 is a view showing the structure of a piezochromic fluorescent material;
FIG. 6 is a view showing a basic skeleton (backbone) structure of a piezochromic fluorescent material;
fig. 7 is a view showing a state of a tamper-proof altered QR code in which an identification pattern made with ink containing a polarizing substance is printed in the QR code;
FIG. 8 is a view showing a state of a forgery-preventing altered QR code in which a recognition pattern (NBST) made of ink containing a polarizing substance is printed on the middle portion of the QR code;
fig. 9 is a view showing a state where a QR code pattern is recognized by a smartphone specific application and a state where a smartphone interface is switched to a specific pseudo-alteration confirmation interface by recognizing the QR code pattern;
fig. 10 shows a state in which the identification pattern (NBST) printed in the middle of the QR code is confirmed using a dedicated pseudo alteration confirmation interface of the smartphone.
[ notation ] to show
10: a QR code; 20: identifying a pattern;
30: a smartphone application; 40: a pseudo-alteration confirmation interface;
50: a smart phone; 60: light emitted by the interface;
100: an anti-counterfeiting morphing device; 110: a substrate;
120: designing a printing layer; 130: a display layer;
131: a first display layer; 132: a second display layer;
140: and pressing the color-changing fluorescent layer.
[ detailed description ] embodiments
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings in which embodiments of the invention are shown, but the described embodiments are only a part and not all of the embodiments of the invention. Based on the embodiments of the present invention, those skilled in the art may still modify the technical solutions described in the foregoing embodiments, or may equivalently replace some of the technical features in the foregoing embodiments; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention. In describing the present invention, a detailed description of a related known art will be omitted if it may make the gist of the present invention obscure.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 and 2 show a cross section of a forgery prevention alteration device including a cholesteric liquid crystal display layer and a piezochromic fluorescent layer, a smartphone, and a polarizing film according to an embodiment of the present invention.
Referring to fig. 1 and 2, the forgery-preventing device (100) including a cholesteric liquid crystal display layer and a piezochromic fluorescent layer according to an embodiment of the present invention includes a substrate (110), a design printing layer (120), a display layer (130) including a first display layer (131) and a second display layer (132), and a piezochromic fluorescent layer (140).
The substrate (110) is positioned at the lowest layer of the anti-counterfeiting modification device (100) comprising the cholesteric liquid crystal display layer, and various films used for manufacturing labels in the field can be made of synthetic resin, paper, metal and the like.
The design printing layer (120) is positioned on the upper part of the base material (110) and prints a pattern that is different from the display layer (30) described later.
The display layer (130) has a thickness of 15 [ mu ] m or less, is located on the design printing layer (120), and includes a first display layer (131) and a second display layer (132).
The first display layer (131) and the second display layer (132) include an embodiment in which only one of the display layers is printed with an ink containing cholesteric liquid crystal, and the remaining display layers are printed with a general ink, and an embodiment in which the first display layer (131) and the second display layer (132) are all printed with an ink containing cholesteric liquid crystal.
In the embodiment where the first display layer (131) and the second display layer (132) are all printed with ink containing cholesteric liquid crystal, the orientation of the cholesteric liquid crystal used in each display layer is different, and a hidden mark for confirming whether or not the display layer is altered can be recognized.
The ink used for printing the display layer is an ink containing cholesteric liquid crystal and an ink not containing cholesteric liquid crystal, which should all be the same color or appear to be the same color at a glance.
Referring to fig. 3 and 4, the forgery prevention apparatus (100) including the cholesteric liquid crystal display layer and the piezochromic fluorescent layer according to the embodiment of the present invention secondarily confirms whether or not the forgery is generated by applying pressure to the piezochromic fluorescent layer (140) in a state of UV irradiation.
According to fig. 5 and 6, the piezochromic fluorescent layer (140) comprises a piezochromic fluorescent material, which accounts for more than 0.01% by weight of the piezochromic fluorescent layer.
The piezochromic fluorescent material is characterized in that: (a) average particle size: 10-150 nm; (b) fluorescence wavelength: 450 to 650 nm.
The organic fluorescent material is one of fluorescent materials including a pi-conjugated structure of an electron donor and an electron acceptor.
Generally, an organic fluorescent material has an intramolecular pi-conjugated system (pi-conjugated system) structure, and thus can facilitate the movement of electrons and exhibit fluorescence properties.
That is, the molecular structure of the fluorescent material is such that the more delocalized the electrons of the pi conjugated system, the easier the electrons move, and the structure is such that single bond and double bond are repeated and the electrons are uniformly distributed, thereby having a planar structure.
As described above, the organic fluorescent material having a planar structure has high fluorescence efficiency in a solution state, and when it is changed to a solid or thin film state, an Excimer (Excimer) is formed by intermolecular interaction and pi-pi stacking (pi-pi stacking), and quenched (quenching) to reduce the quantum efficiency, i.e., fluorescence intensity.
Referring to fig. 5 and 6, the piezochromic fluorescent material is designed to have a non-planar structure (non-planar structure), and the initial state has a low fluorescence intensity, but gradually becomes a fixed state and then is stacked into a twisted structure, inducing aggregation, inhibiting the formation of aggregates, and increasing the fluorescence efficiency. This principle is called Aggregation Induced Emission (Aggregation Induced Emission).
And is one of organic fluorescent materials in which an Electron Donor (EDG) and an Electron Acceptor (EAG) in a molecule move electrons of a pi-conjugated system by pressure to move.
Here, the piezochromic fluorescent material is a structure having a pi-conjugated system with a low HOMO-LUMO energy gap (energy band gap) for the purpose of facilitating electron transfer.
The basic skeleton is one of fluorine (fluoroene), carbazole (carbazole), dithienothiozole (dithienosilole) or anthracene (anthracene).
The basic skeleton is combined with more than one pi system, namely benzene ring, at two sides, and at least has one electron donor and one electron acceptor.
The electron donor includes one or more of alkylamino (alkyl amine group), arylamino (aryl amino group), and aryl amide (alkyl amide group).
The electron acceptor includes one or more of a cyano group (cyano group), a nitro group (nitro group), or a fluoroalkyl group (fluoroalkyl group) having one or more carbons.
The binder to mix the piezochromic fluorescent material is a neutral transparent binder that can be used with various binders used in the art.
The piezochromic fluorescent layer (140) comprising the piezochromic fluorescent material has the following characteristics: (a) visible light transmittance: 75-95%; (b) piezochromic thickness: 1-100 μm; and (c) pressure of pressing: 4B or more.
Fig. 7 to 10 illustrate the state of the tamper-proof device (100) according to an embodiment of the present invention; a smartphone (50) state with a smartphone application (30); confirming whether the mobile phone (50) is changed or not by using the mobile phone application program (30) and the anti-counterfeiting changing device (100); the cross-sectional view of a false alteration identifying method using a false alteration preventing device containing a polarizing substance and a false alteration device containing polarizing substances of various forms.
Referring to fig. 7 to 10, the anti-counterfeit device (100) according to an embodiment of the present invention includes a QR code (10), an identification pattern (20), a smart phone application (30), a pseudo-alteration confirmation interface (40), a smart phone (50), and a light (60) emitted from the interface.
Referring to fig. 7 to 10, a forgery prevention alteration apparatus (100) according to an embodiment of the present invention is configured to simultaneously perform a first determination of whether or not a QR code (10) is altered by a computer built in a smartphone and the QR code (10) and a second determination of whether or not the QR code (10) is altered by an identification pattern (20) printed with a polarizing material in the middle of the QR code (10), in a process of checking the image of the QR code (10) by the smartphone and a smartphone application (30) described later.
Here, the second determination as to whether or not the false alteration is caused may be visually recognized by using a false alteration confirmation interface (40) induced by a polarizing film (not shown) or a smartphone application (30) described later.
The smart phone application (30) is a program set on a smart phone or the like, and operates 1) a first pseudo-alteration or non-alteration identifying process for judging whether to alter or not in a process of identifying a QR code (10) by using a camera installed on a smart phone or the like as described above; 2) and a secondary false alteration identifying process for identifying the false alteration or not by observing the identification pattern (20) printed with the polarizing material with the naked eye through a false alteration confirming interface (40) which is selectively switched after identifying the QR code (10).
In the second pseudo-alteration checking process for checking the identification pattern by visual observation through the pseudo-alteration checking interface (40), the identification pattern (20) is irradiated with light (60) emitted from the pseudo-alteration checking interface, and the presence or absence of the identification pattern (20) or the pattern matching is checked.
The false alteration confirmation interface (40) is formed by white background in the area of more than 70% of the interface.
The background may be gray, ivory, yellow, blue or pale green in addition to white, but the recognition pattern (20) can be most clearly recognized using a white background.

Claims (9)

1. An anti-counterfeiting device, comprising:
a substrate;
a design printing layer which is positioned on the upper side of the base material and is printed with a specific pattern;
and the piezochromic fluorescent layer is positioned on the upper part of the cholesteric liquid crystal display layer of the design printing layer.
2. A tamper-evident device as recited in claim 1,
the piezochromic fluorescent layer comprises a piezochromic fluorescent material with a pi conjugated system;
the piezochromic fluorescent material with the pi conjugated system is combined with more than one pi system, namely benzene rings, on two sides of a basic skeleton, and at least one electron donor and at least one electron acceptor are respectively arranged.
3. A tamper-evident device as recited in claim 2,
the basic skeleton is selected from the group consisting of fluorine, carbazole, dithienothiole and anthracene;
the electron donor is selected from the group consisting of alkylamino, arylamino, arylamide, and mixtures thereof;
the electron acceptor is selected from the group consisting of cyano, nitro, fluoroalkyl, and mixtures thereof.
4. A tamper-evident device as recited in claim 3,
the weight of the piezochromic fluorescent layer is 0.01-5.0%.
5. A tamper-evident device as recited in claim 4,
the piezochromic fluorescent material comprises the following characteristics:
(a) average particle size: 10-150 nm;
(b) fluorescence wavelength: 450 to 650 nm.
6. A tamper-evident device as recited in claim 5,
the piezochromic fluorescent layer comprises the following characteristics:
(a) visible light transmittance: 75-95%;
(b) piezochromic thickness: 1-100 μm:
(c) pressing pressure: 4B or more.
7. A tamper-evident device as recited in claim 6,
the piezochromic fluorescent material is distributed along the printed pattern on the design printing layer, and the printed pattern on the design printing layer shows when pressure is applied.
8. A tamper-evident device as recited in claim 7,
whether or not the false alteration is caused can be confirmed by irradiating UV light and applying pressure.
9. A method for confirming whether a false change is made,
use of the tamper-proof device according to any one of claims 1 to 8, for confirming whether or not the tamper is counterfeit by irradiating UV light and applying pressure.
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