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CN116047805A - Anti-counterfeiting changing device and verification method - Google Patents

Anti-counterfeiting changing device and verification method Download PDF

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Publication number
CN116047805A
CN116047805A CN202210818512.3A CN202210818512A CN116047805A CN 116047805 A CN116047805 A CN 116047805A CN 202210818512 A CN202210818512 A CN 202210818512A CN 116047805 A CN116047805 A CN 116047805A
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CN
China
Prior art keywords
display layer
color
layer
liquid crystal
polarized light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210818512.3A
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Chinese (zh)
Inventor
李仁淑
李算
金皙衡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xinwei Zhifang Co ltd
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Xinwei Zhifang Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from KR1020210145139A external-priority patent/KR102430790B1/en
Priority claimed from KR1020210145146A external-priority patent/KR102460572B1/en
Application filed by Xinwei Zhifang Co ltd filed Critical Xinwei Zhifang Co ltd
Publication of CN116047805A publication Critical patent/CN116047805A/en
Pending legal-status Critical Current

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    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133543—Cholesteric polarisers
    • 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
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Polarising Elements (AREA)

Abstract

The present invention relates to an anti-counterfeiting modification apparatus, preferably comprising: a substrate layer; and a display layer which is arranged on the upper side of the substrate layer, is printed with a liquid crystal ink containing a chromaticity dye or is formed by a liquid crystal film containing a chromaticity dye, and is internally provided with a recognition pattern of a latent image which cannot be recognized by naked eyes in a state of non-polarized light irradiation. The color of the chroma dye is a color that is in a color contrast relationship with the dye applied to the substrate layer.

Description

Anti-counterfeiting changing device and verification method
Technical Field
The invention relates to an anti-counterfeiting variable device and a verification method for improving visibility by utilizing a color contrast relationship.
Background
As a verification method of the anti-counterfeit device, various methods including light verification, heat verification, pressure verification, magnetic verification, and the like are available. With the recent popularization of smart phones capable of performing polarization verification, the irradiation of polarized light on polarized light (lc) has led to the increasing and highly developed use of the verification method for the presentation of the inherent hidden mark.
As one of the polarizing liquid crystals that can perform pseudo-variable verification, cholesteric (cholesteric) liquid crystals, which include molecules of each layer inclined at an angle to form a helical structure, are suitable for LCD panels mainly used in cellular phones, and recently have been widely used in pseudo-variable labels.
The cholesteric liquid crystal has a characteristic that light is selectively reflected according to the twist direction of a spiral and the pitch of a repeating structure, and a specific color is exhibited, and visibility is one of the most important factors in terms of a problem of performing light verification by a color that changes with irradiation of light.
As a means for improving visibility, a cholesteric liquid crystal itself may be designed and improved so as to have a prominent reflectance or color rendering property, and this is a widely used method in the prior art.
However, in the related art, since there is a problem in that it is difficult to secure visibility under specific conditions, such as a decrease in light intensity or poor performance of a camera or contamination of a label, it is necessary to increase relative visibility caused by an arrangement relationship between adjacent layers, such as a base material layer or a design print layer.
Disclosure of Invention
Technical problem
The purpose of the present invention is to provide an anti-counterfeit device comprising a highly visible polarizing layer.
The object of the invention is to make it possible for a verification machine to recognize hidden marks of an anti-counterfeit device even better.
The purpose of the present invention is to realize diversification of specific verification techniques in a light verification system using polarized light.
Technical proposal
According to an embodiment of the present invention, preferably, it includes: a substrate layer; and a display layer which is arranged on the upper side of the substrate layer, is printed with liquid crystal ink or is formed by a colored liquid crystal film, and is internally provided with a recognition pattern of a latent image which cannot be recognized by naked eyes in a non-polarized light irradiation state. And in the polarized light irradiation state, the color developed by the display layer and the dye coated on the substrate layer form a color in a color contrast relationship.
According to an exemplary embodiment, the color contrast relationship is a color contrast relationship in which the difference in chromaticity values on the munsell color system is 7 or more.
According to an exemplary embodiment, the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules; a second display layer printed with a common ink that does not contain cholesteric liquid crystal microcapsules; the color developed when polarized light is irradiated on the first display layer is in chromaticity contrast relationship with the color of the dye contained in the second display layer.
According to an exemplary embodiment, further comprising: a design printing layer which is arranged between the substrate layer and the display layer and forms a specific pattern printed by common ink; the display layer is laminated on the upper part of the design printing layer; the color appearing on the display layer in the polarized light irradiation state is in color-chromaticity contrast relationship with the color of the dye contained in the common ink printed on the design printing layer.
According to an exemplary embodiment, the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules; a second display layer; a third display layer comprising cholesteric liquid crystal microcapsules; the color appearing when the polarized light is irradiated on the first display layer is in a chromaticity contrast relationship with the color of the dye contained on the substrate layer or the second display layer; the color developed when polarized light is irradiated on the third display layer is similar to the color of the dye contained on the substrate layer or the second display layer in chromaticity relation.
According to an exemplary embodiment, the colorimetric contrast relationship is a color relationship in which the difference in colorimetric values on the Munsell (A.H, munsell) color system is below 2.
According to an exemplary embodiment, the color contrast relationship is a brightness contrast relationship in which the brightness value difference over the munsell color system is above 7.
According to an exemplary embodiment, the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules; a second display layer comprising cholesteric liquid crystal microcapsules having different alignment from the first display layer; the colors appearing when polarized light is irradiated on the first display layer and the second display layer form brightness contrast relation with each other.
According to an exemplary embodiment, further comprising: a design printing layer which is arranged between the substrate layer and the display layer and forms a specific pattern printed by common ink; the display layer is laminated on the upper part of the design printing layer; the color appearing on the display layer in the polarized light irradiation state is in color brightness contrast relationship with the color of the dye contained in the common ink printed on the design printing layer.
According to an exemplary embodiment, the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules; a second display layer; a third display layer comprising cholesteric liquid crystal microcapsules; the color appearing when the polarized light is irradiated on the first display layer is in brightness contrast relationship with the dye color contained on the substrate layer or the second display layer; the color developed when polarized light is irradiated on the third display layer is similar to the color of dye contained on the substrate layer or the second display layer in brightness relationship.
According to an exemplary embodiment, the similar brightness relationship is a color relationship in which the brightness value difference across the munsell color system is below 2.
According to an exemplary embodiment, as the pseudo-modification verification method of the anti-counterfeit modification apparatus, there is provided: a first verification step of recognizing, on the display layer irradiated with polarized light, a first pattern visualized through the first display layer by a display device; a second verification step of identifying, by the display device, a second pattern appearing through the second display layer.
According to an exemplary embodiment, the first verification step is performed sequentially or simultaneously by the display device.
According to an exemplary embodiment, the first display layer and the second display layer have a color synchronization rate of 95% or more with respect to visual observation in a state of non-polarized light irradiation.
According to an exemplary embodiment, further comprising: an extension film disposed on the upper side of the display layer can improve visibility at the time of light verification.
According to an embodiment of the present invention, a method of manufacturing the anti-counterfeit device may be provided.
According to an exemplary embodiment, the cholesteric liquid crystal-containing ink of the present invention may preferably include an oily solvent and an organic polymer.
According to an exemplary embodiment, 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 (Methylethyl ketone), toluene (toluene), cyclohexanone (cyclohexanone), and a mixture including these.
According to an exemplary embodiment, the organic polymer of the present invention is a heat-curable or photo-curable adhesive. Preferably, the thermosetting polymer may be selected from polyurethane (polyurethane) polymers, polyvinyl alcohol (polyvinyl alcohol) polymers, polyacrylic acid (polyacrylic) polymers, epoxy resin (epoxy) polymers, melamine (melamine) resins, isocyanate (isocyanate) polymers, cellulose derivatives, and a group including these mixtures. The photocurable adhesive may be selected from the group consisting of acrylate (acrylate), epoxy (epoxy), and vinyl monomers.
According to an exemplary embodiment, the anti-counterfeiting variable medium of the present invention is preferably a label, sticker, packaging material or paint.
According to an exemplary embodiment, the specific pattern of the present invention, which can distinguish whether a fake is created, is preferably a bar code or a QR code, and most preferably a QR code.
According to an exemplary embodiment, the term "pseudo-variant" as used in this specification refers to the act of newly manufacturing an item that is not currently present for the purpose of use by an unauthorized person, or to any act of changing an existing item without authorization.
Advantageous effects
The invention has the beneficial effects that the invention can provide the anti-counterfeiting variable device comprising the polarizing layer with high visibility;
according to the invention, the verification machine can better identify the hidden mark of the anti-counterfeiting variable device;
according to the present invention, the specific verification technique in the light verification system using polarized light can be diversified.
Drawings
FIG. 1 is a schematic representation of cholesteric liquid crystal ink and liquid crystal structure;
FIG. 2 is a cross-section showing an anti-counterfeiting device according to an embodiment of the present invention;
FIG. 3 is a schematic representation of a Munsell color system;
FIG. 4 is a cross-section showing an anti-counterfeiting device according to another embodiment of the present invention;
FIG. 5 is a cross-section showing an anti-counterfeiting device according to another embodiment of the present invention;
fig. 6 is a view illustrating a state of viewing with a polarizing film (polarizing viewer) after the anti-counterfeit device including no extended film layer and the anti-counterfeit device including an extended film layer of fig. 5 are placed side by side;
FIG. 7 is a diagram showing a state of confirming whether a fake is created or not by using a mobile phone interface;
fig. 8 shows a state in which whether or not a pseudo-alteration is confirmed by a polarizing film.
Symbol description
100: an anti-counterfeiting variable device; 110: a substrate layer;
120: designing a printing layer; 130: a display layer;
131: a first display layer; 132: a second display layer;
133: a third display layer; 140: an adhesive layer;
150: and extending the film layer.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, but the described embodiments are some, but not all embodiments of the present 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 perform equivalent substitutions for some technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 is a view showing a state of molecular arrangement of cholesteric liquid crystal used in an anti-counterfeit device using polarized light, wherein each planar layer has a different molecular arrangement, and gradually forms a spiral rotation shape to an upper portion or a lower portion.
When the surface of the cholesteric liquid crystal is irradiated with polarized light, various colors and patterns are outwardly exhibited according to the arrangement state of the molecules, and this latent image development technique can be applied to a display layer of an anti-counterfeit device described below.
An anti-counterfeit device 100 according to an embodiment of the present invention will be described with reference to fig. 2.
An anti-counterfeiting variable device according to an embodiment of the present invention may include: a substrate layer 110; a design printing layer 120 laminated on the upper side of the base material layer and printed with a general ink; a display layer 130 laminated on the upper side of the base layer 110 or the design print layer and printed with cholesteric liquid crystal ink and having a hidden mark inside.
The base layer 110 may be positioned at the lowermost layer of the anti-counterfeit device 100, and various kinds of film layers used in the art for manufacturing a label, such as synthetic resin, paper, and metal, may be used.
The design printing layer 120 is printed using a general ink which allows a pattern to be visually checked even when the substrate layer 110 is irradiated with unpolarized light, and may be formed of a pattern different from the display layer 130 described later.
The pattern constituting the design print layer 120 may be constituted by various forms and colors, but is preferably constituted by a pattern that can be digitally authenticated by a display device such as a QR code or a BAR code.
In the case where the display layer 130 is printed on the base layer 110 or the design print layer 120 is provided, the display layer may be printed on the design print layer 120, and may include a first display layer 131 and a second display layer 132.
The display layer 130 may have a print thickness of 15 μm or less, and the core element related to the applicability of the display layer 130 when printed on the design print layer 120 or the base material layer 110 is the thickness of the print layer, and if the print layer is thick, there is a possibility that the available print base material is limited or not printable.
The lower limit of the average size of the ink particles usable for actual printing is 15 μm (for example, screen printing method), and the average ink particle size of the printing method (for example, gravure printing method, offset printing method) which is further optimized is 5 μm or less.
Therefore, the thickness of the display layer 150 according to an embodiment of the present invention may be 15 μm or less, and the thickness of the printed layer may be thinner for application to packaging materials and the like, and thus may be more preferably 5 μm or less.
On the other hand, both the first display layer 131 and the second display layer 132 may be printed with cholesteric liquid crystal ink, and only one of the first display layer 131 and the second display layer 132 may be printed with cholesteric liquid crystal ink, or the other display layers may be printed with common ink.
When the first display layer 131 and the second display layer 132 are printed with the cholesteric liquid crystal-containing ink, the alignment of the cholesteric liquid crystal used for each display layer is different, and when polarized light is irradiated to each other, different colors can be recognized, and further, a hidden mark for confirming whether or not a pseudo-is created can be recognized.
Further, the first display layer 131 and the second display layer 132 are ink-printed which can display the same color or look the same at a glance in a state of non-polarized light irradiation, and more specifically, the first display layer and the second display layer are preferably at least 95% in color synchronization with respect to visual observation in a state of non-polarized light irradiation.
The reason is that, although there is also a case where a genuine product authentication method is disclosed to the outside, it is possible to prevent a consumer or a third party who produces or sells a counterfeit product from measuring the genuine product authentication method with the naked eye only if a seller of the product or a counterfeit service provider can confirm whether the product is a counterfeit product.
The cholesteric liquid crystal powder may be cholesteric liquid crystal microcapsules having a diameter of about 10 μm on average that is printable.
The display layer 130 formed of an ink containing cholesteric liquid crystal is formed such that the total weight of the ink containing cholesteric liquid crystal is 1 to 30% by weight of cholesteric liquid crystal powder, and at least a part of the total weight may be occupied by at least one of the common inks.
The display layer including cholesteric liquid crystal in the display layer may be mixed with each other by a cholesteric liquid crystal powder and a thermosetting adhesive, and the weight of the cholesteric liquid crystal powder is 30% or less of the maximum value that can be bonded to the base material layer 110 or the design print layer 120 after being mixed with the adhesive.
Further, in view of adhesion and stability, the heat-curable adhesive is preferably an Acrylate-based adhesive (Acrylate-based adhesive).
And the higher the weight of the cholesteric liquid crystal powder, the higher the visibility upon verification becomes.
Of the total weight of the ink containing cholesteric liquid crystal, at least a part of the remaining weight may be occupied by an unusual ink, i.e., nematic liquid crystal or liquid crystal polymer, in addition to the weight of cholesteric liquid crystal.
Further, a part of the total weight of the ink is composed of cholesteric liquid crystal, and the other part is composed of nematic liquid crystal or liquid crystal polymer, and when a current is inputted thereto, the alignment angle of the nematic liquid crystal or liquid crystal polymer is adjusted, and further, when the polarized light is irradiated at the time of verification, the front and rear colors can be irradiated differently.
The first display layer 131 and the second display layer 132 may be printed with one of a phosphorescent ink (phosphorescence ink), a thermochromic ink (thermochromatic ink), a photochromic ink (photochromic ink), a optically variable ink (optical variable ink), a magnetic ink (magnetic ink), a Humidity sensitive ink (Humidi ink), and a piezochromic ink (pressure ink) in addition to a liquid crystal ink containing cholesteric liquid crystal.
On the other hand, in order to improve visibility during verification, the liquid crystal ink constituting the display layer 130 is a color which is displayed on the display layer in a state of polarized light irradiation and which is in a chromaticity contrast relationship with the dye applied to the base layer 110.
The color developed in the state that the polarized light is irradiated to the liquid crystal ink is a color that forms a chromaticity contrast relationship with the dye applied to the substrate layer 110 or the dye contained in the design printing layer 120.
In the present specification, the chromaticity contrast refers to a color relationship in which the chromaticity difference of a predetermined value or more is present in a color system of Munsell (A.H, munsell), and when viewed side by side, a color having a high chromaticity appears to be a brighter color combination due to the influence of each other.
The chromaticity contrast in this specification is such that the difference in chromaticity values over the munsell color system is above 7, preferably above 8.
With this structure, the color of the display layer 130 can be clearly contrasted with the base material layer 110 or the design print layer 120 upon polarized light irradiation, so that the hidden mark can be more clearly displayed upon light verification.
According to another embodiment of the present invention, the liquid crystal ink constituting the display layer 130 is a color that appears on the display layer in a state of polarized light irradiation in a brightness contrast relationship with the dye applied on the substrate layer 110.
The color developed in the state that the polarized light is irradiated to the liquid crystal ink is a color having a brightness contrast relationship with the dye applied on the substrate layer 110 or the dye contained in the design printing layer 120.
The brightness contrast relationship in the present specification refers to a combination of colors that have a brightness difference of a predetermined value or more in the munsell color system, and when viewed side by side, the colors having high brightness appear brighter due to the mutual influence.
The brightness contrast relationship in this specification is that the difference in brightness values over the munsell color system is 7 or more, preferably 8 or more.
In this embodiment, as in the previous embodiment, the color of the display layer 130 can be clearly contrasted with the color of the substrate layer 110 or the design print layer 120 when polarized light is irradiated, so that the hidden mark can be clearly displayed when light is verified.
The two embodiments described above may also be applied in a non-optical verification manner, i.e. using temperature or magnetism or pressure or humidity verification, where the color appearing on the display layer 130 is in a color (chromaticity or brightness) contrast with the color of the substrate layer 110 or the design print layer 120 as the temperature changes, or as the magnetism or pressure is applied, or as the humidity changes.
Fig. 3 shows hue circle of Munsell (A.H, munsell), and here, the chromaticity contrast relationship is a relationship between a chromaticity value 2 and a chromaticity value 9 on a radial direction (chroma) line of the display chromaticity, and may be defined as a relationship in which visibility is maximized when the relationship is compared adjacently to each other by a predetermined value (7, preferably 8) or more at upper and lower chromaticity positions.
The similar chromaticity relation (1) defined in the present specification may be specified as a color relation in which a chromaticity value 5 and a chromaticity value 6 are located at positions different from each other by a predetermined value (2, preferably 1) or less in the upper and lower chromaticity positions in the radial direction representing chromaticity, and the similar chromaticity relation is a color relation in which a similar color appears to the naked eye when compared adjacently to each other.
The brightness contrast relationship is a relationship between a brightness Value 2 and a brightness Value 9 on a vertical axis (Value) representing brightness, and a color relationship at a position different from a predetermined Value (7, preferably 8) or more at the upper and lower brightness positions can be defined as a relationship in which visibility is maximized when the values are compared adjacently to each other.
The similar brightness relationship (1) defined in the present specification is a relationship between a brightness Value 5 and a brightness Value 6 on a vertical axis (Value) showing brightness, and may be specified as a color relationship at a position lower than a predetermined Value (2, preferably 1) in the upper and lower brightness positions, and is a color relationship in which a similar color appears to the naked eye when compared adjacently to each other.
An anti-counterfeit device according to another embodiment of the present invention will be described below with reference to fig. 4, but differences from the above-described embodiments will be mainly described for avoiding repetitive description.
The display layer 130 may include a third display layer 133 including cholesteric liquid crystal microcapsules in addition to the first display layer 131 and the second display layer 132.
Specifically, the color contained in the cholesteric liquid crystal microcapsule of the first display layer 131 and appearing upon irradiation of polarized light is in a chromaticity-contrast relationship with the color of the dye contained in the base material layer 110 or the second display layer 132, and the color contained in the cholesteric liquid crystal microcapsule contained on the third display layer 133 and appearing upon irradiation of polarized light is in a chromaticity-like relationship with the color of the dye contained in the base material layer 110 or the design printing layer 120 or the second display layer 132.
Further, during verification, the first pattern appearing through the first display layer 131 appears clearly, and the second pattern appearing through the third display layer 133 appears more blurred, and is indistinguishable from the base material layer 110 or the design print layer 120 or the second display layer 132.
The color contained in the cholesteric liquid crystal capsules of the first display layer 131 and displayed upon polarized light irradiation is in a brightness contrast relationship with the color of the dye contained in the base material layer 110 or the second display layer 132, and the color contained in the cholesteric liquid crystal capsules on the third display layer 133 and displayed upon polarized light irradiation is in a similar brightness relationship with the color of the dye contained in the base material layer 110 or the design printing layer 120 or the second display layer 132.
In the same way as in the present embodiment, during verification, the first pattern appearing through the first display layer 131 appears clearly, and the second pattern appearing through the third display layer 133 appears more blurred, and cannot be distinguished from the base material layer 110 or the design print layer 120 or the second display layer 132.
Through the double contrast relationship, the clear pattern and the indistinct pattern which is difficult to identify are utilized to carry out verification or two-step verification at the same time, thereby improving the safety of the anti-counterfeiting variable device to the maximum extent.
An anti-counterfeit device 100 according to another embodiment of the present invention will be described with reference to fig. 5.
The anti-counterfeit device 100 according to another embodiment of the present invention may further include an adhesive layer 140 laminated on the upper portion of the display layer and an extension film layer 150 adhered to the adhesive layer 140 and extending polymer molecules of general plastics in a certain direction.
When the extension film layer 150 is positioned on the upper portion of the display layer 130, the light refracted by the cholesteric liquid crystal ink is further refracted to increase the recognition force of the recognition pattern (hidden mark) at the time of verification.
The stretched film is preferably composed of a oriented polypropylene film (Bi-Axially oriented PP film) having improved optical characteristics and improved transparency.
Fig. 6 shows an example of an experiment in which an anti-counterfeit device not including the stretched film 150 and an anti-counterfeit device including the stretched film 150 were placed in parallel and then verified by a polarizing film (polarizing viewer).
Here, the display layer 130 is formed of a circular pattern, and it can be seen that the anti-counterfeit device including the extended film layer 150 on the right side is more flickering and higher in chromaticity than the left side.
Further, as shown in this experimental example, it was found that the color displayed was more sparkling by using the result of comparing the stretched film layers which could be folded by polarization, thereby obtaining an effect of improving the visibility.
The right anti-counterfeiting variable device for the comparison experiment comprises: a substrate layer comprising PP synthetic paper; a design print layer comprising a binder having a silver powder pigment content of up to 15%; a first display layer formed by mixing and printing 10% of cholesteric liquid crystal microcapsules with 7% of liquid crystal content and an acrylic adhesive; a second display layer formed by mixed printing 10% of cholesteric liquid crystal microcapsules with a liquid crystal content of 7% and 90% of acrylate adhesive; an extended film (oriented polypropylene film) layer of 30 μm.
Fig. 7 is an example of a state in which the liquid crystal of the mobile device is irradiated with polarized light to visualize the pattern of the identification pattern of the latent image in the display layer 130, and the optical verification is performed, and fig. 8 is an example of a state in which the polarized light reaches the anti-counterfeit device 100 including the cholesteric liquid crystal display layer by using the polarizing film to visualize the pattern of the identification pattern of the latent image, and the optical verification is performed.
The pseudo-modification verification method of the anti-counterfeit modification apparatus 100 by the mobile device 50 provided with the screen will be described in detail.
The anti-counterfeiting variable authentication method of the anti-counterfeiting variable device 100 according to an embodiment of the present invention includes: a first verification step S1 of shooting the anti-counterfeit alteration apparatus 100 by a camera installed on the display device, and then confirming whether the anti-counterfeit alteration is performed or not by a pattern which can only be checked by naked eyes in a non-polarized light irradiation state; the pseudo-alteration verification method is a secondary verification step S2 of confirming whether the anti-counterfeiting alteration is performed or not by the pattern to be checked in a state where the polarized light is irradiated to the anti-counterfeiting alteration device 100.
The polarization verification, i.e., the secondary verification step S2, may be performed in the manner described in fig. 7 and 8.
The secondary authentication step S2 by the display device may include: a 2-1 st verification step S2-1 of checking the first pattern which is clearly displayed; and a 2-1 st verification step S2-2 of checking the second pattern which is displayed in a blurred state and is required to precisely identify the pattern.
Even though not described in the present specification, the present invention can produce other effects with the above-described respective structures, and can produce new effects which cannot be seen from the prior art, based on the organic bonding relationship between the above-described respective structures.
While the embodiments illustrated in the drawings may be modified to implement in other forms, structural implementations within the scope of the claims of the present invention may be applied, or equivalents may be substituted, embodiments made without making any inventive effort fall within the scope of the present invention.

Claims (11)

1. An anti-counterfeiting variable device is characterized in that,
comprising the following steps: a substrate layer;
a display layer disposed on the upper side of the base material layer, printed with a liquid crystal ink or formed of a colored liquid crystal film, and having a latent image recognition pattern which is not recognized by the naked eye in a non-polarized light irradiation state;
and in the polarized light irradiation state, the color developed by the display layer and the dye coated on the substrate layer form a color in a color contrast relationship.
2. The anti-counterfeiting device according to claim 1, wherein,
the color contrast relationship is a chromaticity contrast relationship in which the difference of chromaticity values on a color system of Munsell (A.H, munsell) is 7 or more.
3. The anti-counterfeiting device according to claim 2, wherein,
the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules;
a second display layer including cholesteric liquid crystal microcapsules having mutually different alignment from the first display layer;
the colors appearing when polarized light is irradiated on the first display layer and the second display layer are colors which form a chromaticity contrast relationship with each other.
4. The anti-counterfeiting device according to claim 2, wherein,
the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules;
a second display layer printed with a common ink that does not contain cholesteric liquid crystal microcapsules;
the color developed when polarized light is irradiated on the first display layer is in chromaticity contrast relationship with the color of the dye contained in the second display layer.
5. The anti-counterfeiting device according to claim 1, wherein,
further comprises: a design printing layer which is arranged between the substrate layer and the display layer and forms a specific pattern printed by common ink;
the display layer is laminated on the upper part of the design printing layer;
the color appearing on the display layer in the polarized light irradiation state is in color-chromaticity contrast relationship with the color of the dye contained in the common ink printed on the design printing layer.
6. The anti-counterfeiting device according to claim 2, wherein,
the display layer includes: a first display layer comprising cholesteric liquid crystal microcapsules; a second display layer; a third display layer comprising cholesteric liquid crystal microcapsules;
the color appearing when the polarized light is irradiated on the first display layer is in a chromaticity contrast relationship with the color of the dye contained on the substrate layer or the second display layer;
the color developed when polarized light is irradiated on the third display layer is similar to the color of the dye contained on the substrate layer or the second display layer in chromaticity relation.
7. The anti-counterfeiting device according to claim 6, wherein,
the similar chromaticity relationship is a color relationship in which the difference in chromaticity value on the munsell color system is 2 or less.
8. The anti-counterfeiting device according to claim 1, wherein,
further comprises: and an extension film disposed on the upper side of the display layer, for improving visibility during light verification.
9. The anti-counterfeiting device according to claim 3, wherein,
in a non-polarized light irradiation state, the first display layer and the second display layer have a color synchronization rate of 95% or more with respect to visual observation.
10. A verification method of an anti-counterfeiting variable device is characterized in that,
as the pseudo-modification verification method of the anti-counterfeit modification apparatus according to claim 6,
comprising the following steps: a first verification step of recognizing, on the display layer irradiated with polarized light, a first pattern visualized through the first display layer by a display device;
a second verification step of identifying, by the display device, a second pattern appearing through the second display layer.
11. The method of authenticating an anti-counterfeit device of claim 10, wherein,
the first verification step is performed sequentially or simultaneously by the display device.
CN202210818512.3A 2021-10-28 2022-07-12 Anti-counterfeiting changing device and verification method Pending CN116047805A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2021-0145146 2021-10-28
KR1020210145139A KR102430790B1 (en) 2021-10-28 2021-10-28 Anti-counterfeiting means for improving visibility by using brightness contrast relation, manufacturing method thereof, and forgery authentication method using the same
KR10-2021-0145139 2021-10-28
KR1020210145146A KR102460572B1 (en) 2021-10-28 2021-10-28 Anti-counterfeiting means for improving visibility by using brightness contrast relation, manufacturing method thereof, and forgery authentication method using the same

Publications (1)

Publication Number Publication Date
CN116047805A true CN116047805A (en) 2023-05-02

Family

ID=86118669

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210818512.3A Pending CN116047805A (en) 2021-10-28 2022-07-12 Anti-counterfeiting changing device and verification method

Country Status (1)

Country Link
CN (1) CN116047805A (en)

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