CN102282568B - Information pattern carrier and method for optically reading information pattern - Google Patents
Information pattern carrier and method for optically reading information pattern Download PDFInfo
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- CN102282568B CN102282568B CN201080004704.6A CN201080004704A CN102282568B CN 102282568 B CN102282568 B CN 102282568B CN 201080004704 A CN201080004704 A CN 201080004704A CN 102282568 B CN102282568 B CN 102282568B
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 26
- 239000010703 silicon Substances 0.000 claims description 26
- 229910052691 Erbium Inorganic materials 0.000 claims description 21
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 21
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- 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
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
- C09K11/562—Chalcogenides
- C09K11/565—Chalcogenides with zinc cadmium
-
- 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
- B42D25/305—Associated digital information
-
- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
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- 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
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/57—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing manganese or rhenium
- C09K11/572—Chalcogenides
- C09K11/574—Chalcogenides with zinc or cadmium
-
- 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
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
- C09K11/582—Chalcogenides
- C09K11/584—Chalcogenides with zinc or cadmium
-
- 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
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
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- B42D2033/20—
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- B42D2035/16—
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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
- B42D25/382—Special inks absorbing or reflecting infrared light
-
- 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
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
Provided is an information pattern carrier, wherein an information pattern (12) is made invisible by forming a mask (13) on the information pattern formed by colored ink or making the color of the colored ink the same as the ground color of an information recording medium (11) or the color of a colored underprint portion. When the information recording medium (11) having the information pattern (12) is mounted on or carried into a predetermined position, excitation light (H1) having energy higher than that of the bandgap of semiconductor quantum dots is applied to the information pattern (12) from a light-emitting diode (15) to thereby thermally expand the semiconductor quantum dots. Light having a wavelength that is shifted to the long-wavelength side is emitted from the thermally expanded semiconductor quantum dots, the emitted light is received by a light sensor (16) having sensitivity to a portion on the long-wavelength side of the shifted wavelength, and the information pattern (12) is read by an information determining unit (17).
Description
Technical field
The present invention relates to be printed with the information pattern carrier such as information recording carrier or management object thing of the information pattern such as bar code or QR code and the optical reading method of this information pattern.
Background technology
In recent years, for various article, various prepaid card or visa card etc., by printing the information pattern such as upper bar code or QR code, and adopt optical pickup device to read this information pattern, carry out thus management or the certification inspection of various article, various prepaid card or visa card.Whether in this case, proposed multiple security system, these security systems are by information pattern being implemented to false proof processing, and utilize optical access system to read this information, carry out discriminant information pattern and forge.
In patent documentation 1, a kind of optical pickup device is disclosed, the information patterns such as the bar code that it contains fluorophor by printing, irradiate semiconductor laser and make phosphor excitation this information pattern, and accept the fluorescence that sends from fluorophor and get information pattern by optics readout means reads.In this device, in the time reading, be separated from each other from the exciting light of semiconductor laser diode with from the peak of the glimmering light wavelength of fluorophor, therefore can only read the luminescent spectrum of fluorophor.In this security system, owing to being difficult to forge fluorophor mark and be difficult to forge the technology that reads fluorophor mark, therefore can there is higher security.
In patent documentation 2, proposed comparable employing semiconductor laser diode device employing more miniaturization and cost cheapness the optical access system of light emitting diode.This optical access system reads the printed layers with non-visible ink printing with optical mode, and fluorophor forms as the inorganic oxide of activating element by having added neodymium.In this fluorophor, the luminescent center wavelength of the light-emitting component of excited fluophor separates from the be subject to light wavelength region of the photo detector of the fluorescence of printed layers with acceptance.Thereby even if adopt the wavelength width light emitting diode wider than semiconductor laser diode in the irradiation of exciting light, the luminous of exciting light and fluorophor also do not overlap, and prevents misinterpretation in the time reading by reading exciting light.In this technology, because information pattern right and wrong are visible, therefore when reading, can not notice the existence of information pattern, thereby there is high security.
Have again, in patent documentation 3, disclose the optical data carrier that contains metallics, wherein, become absorbed light to long wavelength shifted reason by the volume increase of the caused data carrier of thermal expansion of the result as irradiation absorption.
Patent documentation 1: TOHKEMY 2001-52108 communique
Patent documentation 2: Japanese kokai publication hei 6-274677 communique
Patent documentation 3: TOHKEMY 2008-512807 communique
Summary of the invention
The problem that invention will solve
In the optical pickup device of patent documentation 1, adopt semiconductor laser diode as light source, therefore the driving circuit of light source complexity and maximization, make the cost of optical pickup device surging.
In addition, the present application person tests with regard to the optical access system of patent documentation 2, and result is that the situation that generation can not be read is more.Think this be because: light emitting diode a little less than light intensity, can not be excited fully compared with semiconductor laser diode, thereby a little less than fluorophor luminous; Because being difficult to detect the luminous of fluorophor a little less than light intensity, can not avoid detecting exciting light in addition.Therefore, the more clearly means of reading information pattern of expectation.
Thereby, the present application person has carried out exploration with keen determination to following printed layers and optical reading method, described printed layers and optical reading method can form the light that can adopt light emitting diode as exciting light, can realize the optical access system of miniaturization and cost cheapness, and the light intensity that fluorophor sends, and can accept the light that the printed layers (information pattern) by being excited by exciting light with patent documentation 1 diverse ways is sent, and can avoid the light that is subject to of exciting light.
In addition, the present application person is conceived to the caused wavelength of thermal expansion of patent documentation 3 to long wavelength side displacement, and repeatedly carry out following thinking,, in the time reading by the above-mentioned avoidance that is subject to light for exciting light to long wavelength side displacement, and the security higher for non-visible information pattern acquisition.
The present invention In view of the foregoing proposes, its object is can not be formed on to identification the information pattern such as bar code or QR code on the information pattern such as information recording carrier or management object thing carrier for naked eyes, the optical reading method of a kind of information pattern carrier and information pattern is provided, they can read clearly in the time reading, even if notice the existence of information pattern, the such optical pickup device of information that malice exploitation can be understood this information pattern is also very difficult, it can realize high security system, and can realize the non-visible trackability that provides high-quality to ensure.
For solving the means of problem
Information pattern carrier of the present invention possess use contain core/shell type semiconductor-quantum-point coloring printing ink form information pattern and cover be formed on information pattern and by the mask of this non-visibleization of information pattern.The formation of information pattern is: with at irradiation energy during than the high excitation line of the band gap of semiconductor-quantum-point, and the light of the wavelength that semiconductor-quantum-point thermal expansion and sending has had to long wavelength side displacement.
In addition, information pattern carrier of the present invention possesses information pattern, described information pattern be use contain core/shell type semiconductor-quantum-point coloring printing ink form, and by the formation color identical with the background color of information recording carrier or management object thing or the color of substrate dyed layer by non-visibleization.The formation of information pattern is: with at irradiation energy during than the high excitation line of the band gap of semiconductor-quantum-point, and the light of the wavelength that semiconductor-quantum-point thermal expansion and sending has had to long wavelength side displacement.
The information pattern carriers such as information recording carrier or management object thing have by coloring printing ink and are printed thereon and with the morphogenetic information pattern of non-visible shape.For this information pattern, in the time reading, by excitation line vitalizing semiconductor quantum dot, make its thermal expansion, and accept now sent to long wavelength side displacement the light of wavelength, carry out the deciphering of information.Therefore, manufacturing when carrier, because information pattern is visible, therefore easily form pattern, after manufacture, information pattern is non-visible, can not notice the existence of information pattern therefore when reading.In the time of reading information pattern, core/shell type semiconductor-quantum-point carries out strong luminous, and its light wavelength of sending is subjected to displacement because of thermal expansion, thereby makes wavelength region may away from exciting light, therefore can not read exciting light, and reading information clearly.In addition, because the light wavelength of sending is subjected to displacement, be therefore difficult to imitate reading device.Owing to can improve the hot absorbability being produced by the irradiation of exciting light by coloring printing ink, temperature easily changes, the therefore easy thermal expansion of semiconductor-quantum-point.About coloring printing ink, be also difficult to simply imitate and manufacture, thereby can improve security.So, can be when compensation naked eyes can not the processing of identification information pattern, the reliable information that can also utilize the optical pickup device that can understand the wavelength after displacement to carry out information pattern is understood.
Any coloured material in the pigment that preferably coloring printing ink is sub-micron by dyestuff, leuco dye or particle diameter is painted.By adopting these coloured materials, and utilize the adjusting of concentration, can be in the case of not hindering exciting light to easily obtaining and absorb the painted of visible ray the irradiation of semiconductor-quantum-point.
Preferably core/shell type semiconductor-quantum-point is using CdSe/ZnS as core.Because it can disperse well in coloring printing ink, do not produce cohesion, be therefore good as the use of ink, thus printing information pattern well.
Also preferably core/shell type semiconductor-quantum-point be any in (a)～(f) below.By adopting these semiconductor-quantum-points, can obtain rightly the displacement of strong wavelength luminous and that formed by the thermal expansion of semiconductor-quantum-point.
(a) using the material that added Te in ZnSe nano particle as core, using ZnS nano particle as shell;
(b) with (Zn (1-2
x) In
xag
xs) as core or shell;
(c) using the ZnS nano particle that contains Mn ion as core;
(d) using ZnS nano particle as core;
(e) using Zn-In-Ag-S based semiconductor nano particle as core;
(f) using silicon nano as core or shell.
Also preferred core/shell type semiconductor-quantum-point is any in following (g), (h).Because the coefficient of thermal expansion of erbium is high, therefore, in the time making semiconductor-quantum-point thermal expansion, make the displacement of wavelength increase by expanding significantly.Therefore, more clearly reading information, thus can improve security.
(g) using silicon nano as core, using erbium as shell;
(h) using erbium as core, using silicon nano as shell.
In addition, optical reading method of the present invention is the optical reading method of information pattern, described information pattern is that the coloring printing ink that contains core/shell type semiconductor-quantum-point by use is formed on information recording carrier or management object thing, and by forming mask thereon by non-visibleization, in described optical reading method, by the excitation line higher than the band gap of semiconductor-quantum-point to this information pattern irradiation energy, make semiconductor-quantum-point thermal expansion; Semiconductor-quantum-point from thermal expansion sends the light of the wavelength having had to long wavelength side displacement; By to displacement the long wavelength side part optical sensor with sensitivity accept the light sending, and reading information pattern.
Another optical reading method of the present invention is the optical reading method of information pattern, described information pattern is that the coloring printing ink that contains core/shell type semiconductor-quantum-point by use is formed on information recording carrier or management object thing, and by forming the color identical with the color of its background color or substrate dyed layer and by non-visibleization, in described optical reading method, by the excitation line higher than the band gap of semiconductor-quantum-point to this information pattern irradiation energy, make semiconductor-quantum-point thermal expansion; Send the light of the wavelength having had to long wavelength side displacement from the semiconductor-quantum-point of thermal expansion; By to displacement the long wavelength side part optical sensor with sensitivity accept the light sending, and reading information pattern.
For the information pattern for non-visible state printing on the information pattern carriers such as information recording carrier or management object thing by coloring printing ink, in the time reading, by using excitation line vitalizing semiconductor quantum dot, make its thermal expansion, accept now to send to long wavelength side displacement the light of wavelength, carry out the deciphering of information.So, in the time reading, undertaken strong luminously by core/shell type semiconductor-quantum-point, its light wavelength of sending is because of thermal expansion displacement, thereby makes wavelength region may away from exciting light, therefore can not read exciting light, and reading information clearly.In addition, because the light wavelength of sending is subjected to displacement, be therefore difficult to imitate reading device.Owing to can improve the hot absorbability being produced by the irradiation of exciting light by coloring printing ink, temperature easily changes, the therefore easy thermal expansion of semiconductor-quantum-point.For coloring printing ink, be also difficult to simply imitate and manufacture, thereby can improve security.So, can compensate the processing that naked eyes can not identification information pattern, and the reliable information that can carry out by understanding the optical pickup device of the wavelength after displacement information pattern is understood.
Any coloured material in the pigment that preferably coloring printing ink is sub-micron by dyestuff, leuco dye or particle diameter is painted.By adopting these coloured materials, and utilize the adjusting of concentration, can be in the case of not hindering exciting light to easily obtaining and absorb the painted of visible ray the irradiation of semiconductor-quantum-point.
Preferably core/shell type semiconductor-quantum-point is using CdSe/ZnS as core.Because it can disperse well in coloring printing ink, do not produce cohesion, be therefore good as the use of ink, thus printing information pattern well.
Also preferably core/shell type semiconductor-quantum-point be any in (a)～(f) below.By adopting these semiconductor-quantum-points, can obtain rightly the displacement of strong wavelength luminous and that produced by the thermal expansion of semiconductor-quantum-point.
(a) using the material that added Te in ZnSe nano particle as core, using ZnS nano particle as shell;
(b) with (Zn (1-2
x) In
xag
xs) as core or shell;
(c) using the ZnS nano particle that contains Mn ion as core;
(d) using ZnS nano particle as core;
(e) using Zn-In-Ag-S based semiconductor nano particle as core;
(f) using silicon nano as core or shell.
Also preferred core/shell type semiconductor-quantum-point is any in following (g), (h).Because the coefficient of thermal expansion of erbium is high, therefore, in the time making semiconductor-quantum-point thermal expansion, make the displacement of wavelength increase by expanding significantly.Therefore, more clearly reading information, thus can improve security.
(g) using silicon nano as core, using erbium as shell;
(h) using erbium as core, using silicon nano as shell.
Invention effect
According to information pattern carrier of the present invention and optical reading method; for utilize coloring printing ink be printed on the information pattern carrier such as information recording carrier or management object thing, and by mask or by with the carrier coloring printing ink that is same color by the information pattern of non-visibleization; in the time reading, pass through with excitation line vitalizing semiconductor quantum dot; make its thermal expansion; and accept now to send to long wavelength side displacement the light of wavelength, carry out the deciphering of information.Therefore,, after manufacture, because information pattern right and wrong are visible, can not notice the existence of information pattern therefore when reading.In the time reading, undertaken strong luminously by core/shell type semiconductor-quantum-point, and its light wavelength of sending is because of thermal expansion displacement, thereby makes wavelength region may away from exciting light, therefore can not read exciting light, and reading information clearly.In addition, due to the light wavelength displacement of sending, be therefore difficult to imitate reading device.Owing to can improve the hot absorbability being produced by the irradiation of exciting light by coloring printing ink, temperature easily changes, the therefore easy thermal expansion of semiconductor-quantum-point.For coloring printing ink, be also difficult to simply imitate and manufacture, thereby can improve security.So, can be when compensation naked eyes can not the processing of identification information pattern, can also carry out by understanding optical pickup device after the wavelength of displacement the reliable information of information pattern and understand.
Brief description of the drawings
Fig. 1 is the skeleton diagram of the reading device of the optical reading method for implementing the 1st embodiment.
Fig. 2 is the curve map that represents the relation of light wavelength that the semiconductor-quantum-point by exciting room temperature sends and intensity.
Fig. 3 represents by making semiconductor-quantum-point expand, excite the curve map of the relation of the light wavelength sent and intensity.
Fig. 4 is the skeleton diagram of the reading device of the optical reading method for implementing the 2nd embodiment.
Fig. 5 is the skeleton diagram of the reading device of the optical reading method for implementing the 3rd embodiment.
Fig. 6 is the optical reading method about the 3rd embodiment, represents by making semiconductor-quantum-point thermal shrinkage, excites the curve map of the relation of the light wavelength sent and intensity.
Symbol description
1,1A reading device
10A, 10B information recording card
11 information recording carriers
11A, 11B information pattern carrier
12 information patterns
13 masks (mask)
14 substrate printed layers
15 light emitting diodes
16,16A optical sensor
17 information detection units
2 optically read mechanisms
3 cooling bodies
H1 exciting light
H2 is by exciting the light sending
Embodiment
Below, with reference to accompanying drawing, the embodiment of information pattern carrier of the present invention and optical reading method is described.
[the 1st embodiment]
Fig. 1 is the information pattern carrier of present embodiment and for implementing the skeleton diagram of reading device of optical reading method.The information of reading device 1 reading information registration card 10A, its summary formation possesses light emitting diode 15 and optically read mechanism 2.
The coloring printing ink that information pattern 12 contains core/shell type semiconductor-quantum-point by use is printed on information recording carrier 11 and forms.In the present embodiment, coloring printing ink contains semiconductor-quantum-point and coloured material and for disperseing to keep their bonding agent.
Semiconductor-quantum-point is the semi-conductive minuteness particle of nano-scale.Core/shell type refers to the type that covers the core of the material of inner side with the shell of the material in outside.In the present embodiment, adopt the core/shell type semiconductor-quantum-point of CdSe/ZnSe.
Coloured material is the material that absorbs visible ray.As coloured material, can adopt dyestuff, leuco dye or particle diameter is any in the pigment of sub-micron, be arranged to coloured material do not hinder the irradiation of described excitation line to described core/shell type semiconductor-quantum-point limit concentration and contain.By adopting these coloured materials and regulating concentration, can easily do not hindered the state of irradiation and absorbed the painted of visible ray.
As coloured material, if particularly adopt pigment, compared with adopting dyestuff, leuco dye, make painted have permanance and against weather, if exceed 1 μ m but the particle diameter of pigment increases, pigment is brought into play original light-proofness and is interdicted light, hinders the irradiation to semiconductor-quantum-point contained in ink.If the particle diameter of pigment be sub-micron (lower than 1 μ m), preferable particle size is unanimously the scope of 0.6～0.8 μ m, as color filter, can possess light transmission, therefore in the case of being arranged to except the colored ink black, particularly preferably adopting in right amount particle diameter is the pigment of 0.6～0.8 μ m scope.In the present embodiment, coloring printing ink is by adopting carbon black to make tusche as coloured material.
By form opaque mask 13 on information pattern 12, this information pattern is formed non-visible.Here, (comprising so-called invisible) roughly can not be seen or can not be seen completely to the so-called non-visible eyes that refer to.
In the present embodiment, mask 13 forms by the mask printing of using the color identical with information pattern 12 pattern to be carried out being coated with on a surface comprehensively.As mask printing, utilize exciting light H1 to the exciting of information pattern 12 in order not hinder, adopt and do not absorb or do not interdict the such printing of exciting light H1.Particularly, as the coloured material of printing use that does not absorb exciting light H1, having dyestuff, leuco dye or particle diameter is pigment of sub-micron etc.Particularly, preferably concentration is defined as and adopts carbon black to make tusche and degree that can not identification information pattern 12.In mask printing, form hidden film (not shown), do not come off so that form the ink of mask printing.
Optically read mechanism 2 possesses optical sensor 16 and information detection unit 17.
The light H2 of optical sensor 16 for accepting to send by the contained core/shell type semiconductor-quantum-point of excitation information pattern 12.The wavelength that optical sensor 16 must the long wavelength side part of the light that the state of thermal expansion sends to long wavelength side displacement occur to the information pattern 12 to contain core/shell type semiconductor-quantum-point has sensitivity, particularly the scope Y of the long wavelength side shown in Fig. 3 is had to sensitivity.In the present embodiment, adopt photodiode as optical sensor 16.
About the optical reading method of present embodiment, if load or deliver to assigned position by mechanical mechanism by thering is the information recording card 10A that becomes non-visible information pattern 12 by mask printing 13, light emitting diode 15 is luminous, for information pattern 12, the exciting light H1 that irradiation energy is higher than the band gap of semiconductor-quantum-point.Exciting light H1 vitalizing semiconductor quantum dot, and by information pattern 12 is heated and makes semiconductor-quantum-point thermal expansion.
The semiconductor-quantum-point being excited sends wavelength and has occurred the light of displacement because of thermal expansion.Particularly, if excite the core/shell type semiconductor-quantum-point that comprises the different CdSe/ZnSe of particle diameter with the state of not thermal expansion, when luminous as shown in Figure 2, each different-grain diameter sends the different multiple light of wavelength.On the other hand, if excited with the state after thermal expansion, as shown in Figure 3, send wavelength to the long wavelength side light of displacement greatly.Have again, in the time that the nuclear particle of core/shell type semiconductor-quantum-point is made up of single particle diameter, wavelength because of thermal expansion also identical to the relation of the large displacement of long wavelength side.Due to the core/shell type that semiconductor-quantum-point is CdSe/ZnSe, what therefore obtain is luminous strong especially.
Accept by the optical sensor 16 long wavelength side part Y to sensitivity the light that semiconductor-quantum-point sends, and convert electric signal to.Information detection unit 17 is graphical this electric signal, by whether check can reading information pattern 12 and the code information of cross-check information pattern 12 whether with the true and false that is recorded in data consistent in database and comes determination information pattern 12.
According to present embodiment, can carry out excitation information pattern 12 by the light emitting diode of common cheapness 15, and can send high light (quantum size effect) from semiconductor-quantum-point.In addition, semiconductor-quantum-point is accompanied by thermal expansion and is excited, and the light sending is offset to long wavelength side, and therefore exciting light and luminous light do not overlap, can clearly detect information pattern, and can be that the photo detectors such as photodiode detect in high sensitivity with the silicon of common cheapness.
Optical pickup device 1 is because semiconductor-quantum-point luminous is to long wavelength side displacement and luminous, therefore forms by using long wavelength side part is had to the formation that light that the optical sensor of sensitivity accepts to send carries out information deciphering.Therefore, be difficult to imitate and manufacture optical pickup device, can realize the optical reading method that high security or quality guarantee can be provided.Consequently, can prevent credit card, cash card, phonecard, ID card, student's identity card, subsides ticket card and accumulating card etc. forgery, forge and distort, also can carry out the miniaturization of system simultaneously and save spatialization, and can realize non-visible trackability.
On information recording carrier 11, form the information patterns such as bar code or QR code with non-visible state, this information pattern can not be with naked eyes identification.In addition, even if if just in case know the despiteful people of IT technology or tissue and notice from the small protuberance of the surperficial print film of information recording carrier 11 existence of information pattern, be also difficult to imitate the ink of manufacturing present embodiment.In addition, even if analyzing the light emitting source of information pattern is core/shell type semiconductor-quantum-point, and develop accordingly by accepting to carry out the reading device of information deciphering by the light sending that conventionally excites of semiconductor-quantum-point, because the light wavelength of sending is offset to long wavelength side, the information that therefore can not utilize like this common reading device to carry out information pattern is understood.
Have, in the time information pattern 12 being printed on information recording carrier 11 by coloring printing ink, information pattern 12 is visible again, therefore easily confirms printed pattern.In the time reading, coloring printing ink absorbs visible ray, therefore makes the temperature of information pattern 12 become easy rising by the irradiation of exciting light, the easy thermal expansion of semiconductor-quantum-point.Particularly in the present embodiment, owing to adopting pigment, the hot absorbability therefore being produced by exciting light irradiation is good.About the composition of coloring printing ink, be difficult owing to simply imitating and manufacturing, therefore from this point to consider, also can realize high security.Particularly in the present embodiment, because having carried out painted ink, the pigment that to have adopted with particle diameter be sub-micron carrys out printing information pattern 12, therefore can realize the information pattern 12 that can obtain having high weather resistance, resistance to fading property aspect color, with high the combining of chemical stability of core/shell type semiconductor-quantum-point, can also realize the system of the quality guarantee that provides for a long time high.In addition, owing to adopting the core/shell type semiconductor-quantum-point of CdSe/ZnS as coloring printing ink, therefore can use by toluene etc. and disperse well and do not produce cohesion, good as the use of ink, and printing information pattern well.
Have again, as the alter mode of present embodiment, also can in reading device, be provided for making the heating arrangements of semiconductor-quantum-point thermal expansion.For example, as heating arrangements, electric heater also can be set, give high heat for the bottom to information recording card 10 and the dorsal part that is printed with information pattern 12, make the semiconductor-quantum-point thermal expansion of information pattern 12.In addition,, as heating arrangements, the mechanism of information pattern 12 being irradiated to hot line (infrared ray etc.) also can be set.By these mechanisms, can heat the semiconductor-quantum-point of information pattern 12 reliably, make its thermal expansion, thereby can more effectively obtain luminous displacement.
For ease of producing the thermal expansion by the semiconductor-quantum-point of excitation light generation, also can form following formation: via collector lens, the exciting light H1 of light emitting diode 15 is carried out to optically focused, and be radiated on information pattern 12.About light emitting diode 15, also can select high-power light emitting diode, also can use multiple light emitting diodes to irradiate, or also can will send ultrared light emitting diode and send ultraviolet light emitting diode and use.
Replace information recording carrier 11, also can form except the mode of information pattern of the management object thing that blocks the object shape to read.As management object thing, there are the commodity except card, be printed with the commodity of bar code or QR etc. as information pattern 12, the backlining of such as books or post the commodity etc. of the seal (seal) that has printed information pattern 12.
(the 2nd embodiment)
Fig. 4 is the skeleton diagram of the reading device of the optical reading method for implementing the 2nd embodiment.The information recording card 10B of present embodiment possesses information pattern carrier 11B, and information pattern carrier 11B possesses information recording carrier (or management object thing) 11, be printed on information recording carrier 11 but do not form the substrate printed layers 14 of information pattern and be printed on the information pattern 12 such as bar code or QR code on information recording carrier 11.Have again, for the 1st embodiment repeat part, mark identical symbol, and description thereof is omitted.
In the present embodiment, by by the color of information pattern 12 be same color than the color assignment that the first substrate of information pattern 12 is printed on the substrate colouring seal brush layer 14 obtaining on information recording carrier 11, make information pattern 12 non-visibleization.Here as the coloring printing ink using in information pattern 12, use the color coloring printing ink identical with substrate printed layers 14.That is to say, all used the pigment of the carbon black that particle diameter is sub-micron at substrate printed layers 14 and information pattern 12.
According to present embodiment, can in the time reading, compensate the state processing information pattern 12 with non-visible in addition, and in the time reading, because coloring printing ink absorbs visible ray, therefore make the temperature of information pattern 12 easily increase by irradiating exciting light, the easy thermal expansion of semiconductor-quantum-point, can read.In addition,, about the composition of coloring printing ink, owing to being difficult to simply to imitate and manufacture, therefore from this point to consider, also can realize high security.
As the alter mode of present embodiment, also can omit substrate printed layers 14, by making the color of information pattern 12 identical with the color of the background color of the one side that is printed with information pattern 12 of information recording carrier 11 or management object thing, thereby information pattern 12 is formed to non-visible state.For example, also can adopt the coloring printing ink of the coloured material identical with mixing pigment in the starting material of information recording card 10B as information pattern 12, direct printing information pattern 12 on information recording card 10B.
(the 3rd embodiment)
Fig. 5 is the skeleton diagram of the reading device of the optical reading method for implementing the 3rd embodiment.In the reading device 1A of present embodiment, be provided with by semiconductor-quantum-point being carried out to the cooling cooling body 3 that makes semiconductor-quantum-point thermal shrinkage.Have again, for the 1st embodiment repeat part, mark identical symbol, and description thereof is omitted.
For cooling body 3, in the present embodiment, it is that information pattern 12 is carried out cooling and then semiconductor-quantum-point is carried out to cooling mechanism.Here, cooling body 3 is electric refrigeratory, its in abutting connection with or can be located at contiguously on the face of a side that there is no printing information pattern 12 of information recording carrier 11, can be cooled to the temperature of-10～0 DEG C.
The optical sensor 16A possessing as the optically read 2A of mechanism, adopts being the optical sensor that wavelength region may that the Ya shown in Fig. 6 represents has sensitivity from the wavelength region may shown in Fig. 2 to the scope of deflection short wavelength side.
In the present embodiment, if the information recording carrier 10 with information pattern 12 is loaded or deliver to assigned position, cooling body 3 carries out coolingly to information pattern 12, makes semiconductor-quantum-point thermal shrinkage.Then, light emitting diode 15 is luminous, the exciting light H1 higher than the band gap of semiconductor-quantum-point to information pattern 12 irradiation energies.Compared with the light wavelength (Fig. 2) that semiconductor-quantum-point during with thermal shrinkage never sends, this semiconductor-quantum-point after thermal shrinkage sends the light having to the wavelength of the short wavelength side displacement shown in Fig. 6.The optical sensor 16A that employing has sensitivity to long wavelength side part Ya accepts the light that this sends, and produces electric signal.Information detection unit 17 is graphical this electric signal, by whether check can reading information pattern 12 and the code information of cross-check information pattern 12 whether with the true and false that is recorded in data consistent in database and comes determination information pattern 12.
According to present embodiment, light emitting source with the mode excitation information pattern 12 of following thermal shrinkage is core/shell type semiconductor-quantum-point, because the light sending is now to short wavelength side displacement, therefore be by adopting the optical sensor that this short wavelength side part is had to sensitivity to accept the formation of carrying out information deciphering after this light sending, because of but only have the formation of separating read message by special optical pickup device, can realize higher security or the system of quality guarantee can be provided.
Have, as the alter mode of present embodiment, cooling body 3 can be also the mechanism that blows Cryogenic air or cryogenic gas in the scope of not destroying information pattern 12 and information recording carrier 11 again.
The present invention is not limited to above-mentioned embodiment, and the various design alterations of carrying out in the scope of the invention main idea of recording in not departing from claims are included in technical scope of the present invention.For example, in the above-described embodiment, adopt the core/shell type semiconductor-quantum-point of CdSe/ZnSe, but also can be by the visible ink printing security information that contains following core/shell type semiconductor-quantum-point.
(a) using the material that added Te in ZnSe nano particle as core, the core/shell type semiconductor-quantum-point using ZnS nano particle as shell;
(b) core/shell type semiconductor-quantum-point is the ZnS nano particle that the contains Mn ion core/shell type semiconductor-quantum-point as core;
(c) by containing Zn
2+, In
3+and Ag
+thiol complex thermal decomposition and the In that adulterated
3+and Ag
+znS nano particle (Zn (1-2
x) In
xag
xs) core/shell type semiconductor-quantum-point;
(d) the core/shell type semiconductor-quantum-point of the ZnS nano particle that core contains Mn ion;
(e) the core/shell type semiconductor-quantum-point using Zn-In-Ag-S based semiconductor nano particle as core;
Or
(f) using silicon nano as core or the core/shell type semiconductor-quantum-point of shell.
In addition the core/shell type semiconductor-quantum-point containing in visible ink, can be also following core/shell type semiconductor-quantum-point:
(g) the core/shell type semiconductor-quantum-point using silicon nano as core, using erbium as shell; Or
(h) the core/shell type semiconductor-quantum-point using erbium as core, using silicon nano as shell.The coefficient of thermal expansion of erbium is 7.6 × 10 in the time of 20 DEG C
-6/ DEG C, being equivalent to 20 DEG C time due to this is 2.5 × 10
-6/ DEG C about 3 times of coefficient of thermal expansion of silicon, therefore adopting erbium is being most preferred aspect the displacement that realizes the wavelength producing by expanding.
When using silicon nano as core, using erbium nano particle as shell, preferably silicon nano is that 1.9nm～4.3nm, erbium nano particle are 1.9nm～4.3nm.
Have again, for the semiconductor-quantum-point using silicon nano as core, using erbium nano particle as shell, if this semiconductor-quantum-point is being dispersed in water, the scopes of 22 DEG C～90 DEG C by after water temp. heating, the exciting light of illumination wavelength 325nm, confirmation can be sent from semiconductor-quantum-point the light of wavelength 720～740nm.
In addition,, when using erbium nano particle as core, using silicon nano as shell, preferably erbium nano particle is that 1.9nm～4.3nm, silicon nano are 1.9nm～4.3nm.
Have again, for the semiconductor-quantum-point using erbium nano particle as core, using silicon nano as shell, if this semiconductor-quantum-point is being dispersed in water, the scopes of 22 DEG C～90 DEG C by after water temp. heating, the exciting light of illumination wavelength 325nm, confirmation can be sent from semiconductor-quantum-point the high light of wavelength 720～740nm.
In addition, if form the adopted surface doping silicon nano of oxygen or inner oxidized silicon oxide nanoparticle as core or shell, employing erbium as the core/shell type semiconductor-quantum-point of shell or core, the stronger light of radiation, is therefore preferred.
In addition, as the core/shell type semiconductor-quantum-point using silicon nano as core, also can adopt multiple alkyl each Si atom in silicon nano to be combined and cover the semiconductor-quantum-point of Si atomic surface with alkyl.This semiconductor-quantum-point can prevent the reduction of emission wavelength and luminescence efficiency, can send visible ray by ultraviolet ray excited.In addition, can be according to Mg
2si and SiCl
4the reaction conditions of (silicon tetrachloride) is adjusted particle diameter, is therefore preferred.
The present invention judges the true and false of various cards except can be used in, and can also be used for the reading of visual information of the trackability of following the trail of goods project.Have, the present invention does not get rid of the light source using semiconductor laser diode as exciting light again.
Utilizability in industry
The present invention can prevent card or certificate forgery, forge and distort, can carry out the miniaturization of system simultaneously and save spatialization, can realize non-visible trackability, can extensively contribute to the field that needs Information preservation.
Claims (12)
1. an information pattern carrier, it possess use contain core/shell type semiconductor-quantum-point coloring printing ink form information pattern and cover be formed on this information pattern and by the mask of this non-visibleization of information pattern, described information pattern carrier is characterised in that: the formation of described information pattern is: at irradiation energy during than the high excitation line of the band gap of described semiconductor-quantum-point, and the light of the wavelength that described semiconductor-quantum-point thermal expansion and sending has had to long wavelength side displacement.
2. an information pattern carrier, it possesses information pattern, described information pattern is to use the coloring printing ink that contains core/shell type semiconductor-quantum-point to form, and by the formation color identical with the background color of information recording carrier or management object thing or the color of substrate dyed layer by non-visibleization, described information pattern carrier is characterised in that: the formation of described information pattern is: at irradiation energy during than the high excitation line of the band gap of described semiconductor-quantum-point, and the light of the wavelength that described semiconductor-quantum-point thermal expansion and sending has had to long wavelength side displacement.
3. information pattern carrier according to claim 1 and 2, is characterized in that: any coloured material in the pigment that described coloring printing ink is sub-micron by dyestuff, leuco dye or particle diameter is painted.
4. information pattern carrier according to claim 1 and 2, is characterized in that: described core/shell type semiconductor-quantum-point is using CdSe/ZnS as core.
5. information pattern carrier according to claim 1 and 2, is characterized in that: described core/shell type semiconductor-quantum-point is any in following (a)～(f):
(a) using the material that added Te in ZnSe nano particle as core, using ZnS nano particle as shell;
(b) with (Zn(1-2
x) In
xag
xs) as core or shell;
(c) using the ZnS nano particle that contains Mn ion as core;
(d) using ZnS nano particle as core;
(e) using Zn-In-Ag-S based semiconductor nano particle as core;
(f) using silicon nano as core or shell.
6. information pattern carrier according to claim 1 and 2, is characterized in that: described core/shell type semiconductor-quantum-point is any in following (g), (h):
(g) using silicon nano as core, using erbium as shell;
(h) using erbium as core, using silicon nano as shell.
7. an optical reading method, it is the optical reading method of information pattern, described information pattern be use contain core/shell type semiconductor-quantum-point coloring printing ink and be formed on information recording carrier or management object thing, and by forming mask thereon by non-visibleization, described optical reading method is characterised in that: by the excitation line higher than the band gap of described semiconductor-quantum-point to described information pattern irradiation energy, make described semiconductor-quantum-point thermal expansion; Semiconductor-quantum-point from this thermal expansion sends the light of the wavelength having had to long wavelength side displacement; By to this displacement the long wavelength side part optical sensor with sensitivity accept described in the light that sends, and read described information pattern.
8. an optical reading method, it is the optical reading method of information pattern, described information pattern is that the coloring printing ink that contains core/shell type semiconductor-quantum-point by use is formed on information recording carrier or management object thing, and by forming the color identical with the color of its background color or substrate dyed layer and by non-visibleization, described optical reading method is characterised in that: by the excitation line higher than the band gap of described semiconductor-quantum-point to described information pattern irradiation energy, make described semiconductor-quantum-point thermal expansion; Semiconductor-quantum-point from this thermal expansion sends the light of the wavelength having had to long wavelength side displacement; By to this displacement the long wavelength side part optical sensor with sensitivity accept described in the light that sends, and read described information pattern.
9. according to the optical reading method described in claim 7 or 8, it is characterized in that: any coloured material in the pigment that described coloring printing ink is sub-micron by dyestuff, leuco dye or particle diameter is painted.
10. according to the optical reading method described in claim 7 or 8, it is characterized in that: described core/shell type semiconductor-quantum-point is using CdSe/ZnS as core.
11. according to the optical reading method described in claim 7 or 8, it is characterized in that: described core/shell type semiconductor-quantum-point is any in following (a)～(f):
(a) using the material that added Te in ZnSe nano particle as core, using ZnS nano particle as shell;
(b) with (Zn(1-2
x) In
xag
xs) as core or shell;
(c) using the ZnS nano particle that contains Mn ion as core;
(d) using ZnS nano particle as core;
(e) using Zn-In-Ag-S based semiconductor nano particle as core;
(f) using silicon nano as core or shell.
12. according to the optical reading method described in claim 7 or 8, it is characterized in that: described core/shell type semiconductor-quantum-point is any in following (g), (h):
(g) using silicon nano as core, using erbium as shell;
(h) using erbium as core, using silicon nano as shell.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-009302 | 2009-01-19 | ||
| JP2009009302 | 2009-01-19 | ||
| JP2009-150802 | 2009-06-25 | ||
| JP2009150802 | 2009-06-25 | ||
| PCT/JP2010/050412 WO2010082625A1 (en) | 2009-01-19 | 2010-01-15 | Information pattern carrier and method for optically reading information pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102282568A CN102282568A (en) | 2011-12-14 |
| CN102282568B true CN102282568B (en) | 2014-06-11 |
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ID=42339879
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080004704.6A Expired - Fee Related CN102282568B (en) | 2009-01-19 | 2010-01-15 | Information pattern carrier and method for optically reading information pattern |
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|---|---|
| JP (1) | JP5339382B2 (en) |
| CN (1) | CN102282568B (en) |
| HK (1) | HK1162723A1 (en) |
| WO (1) | WO2010082625A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6164637B2 (en) * | 2013-03-22 | 2017-07-19 | 国立大学法人名古屋大学 | Fluorescent probe for labeling biological samples |
| CN105882184B (en) * | 2014-11-05 | 2019-02-22 | 北京印刷学院 | A kind of method for anti-counterfeit using function ink and printing element synergistic effect |
| US9734444B2 (en) * | 2015-06-05 | 2017-08-15 | Empire Technology Development Llc | Solid-state barcodes and methods for their preparation and use |
| CN107305776B (en) * | 2016-04-18 | 2019-12-10 | 中国科学院化学研究所 | Information recording method and information transmission method using photonic crystal as carrier |
| CN106928776A (en) * | 2017-04-24 | 2017-07-07 | 于军胜 | A kind of water base nano silver wire conductive ink containing luminescent quantum dot |
| CN112969594B (en) * | 2018-10-31 | 2023-03-24 | 韩国机械研究院 | Structural colored substrate, method of manufacturing structural colored substrate, and security verification system using structural colored substrate manufactured thereby |
| CN110456071B (en) * | 2019-08-01 | 2023-01-13 | 济南大学 | Preparation method of electrochemical luminescence sensor for detecting N-terminal brain natriuretic peptide precursor by quantum dot functionalized metal organic framework structure |
| DE102019216003B4 (en) * | 2019-10-17 | 2022-04-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Optical security feature suitable for Track & Trace and/or serialization systems |
| WO2021161860A1 (en) * | 2020-02-10 | 2021-08-19 | 三菱ケミカル株式会社 | Composition containing semiconductor nanoparticles, color filter, and image display device |
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| CN2546918Y (en) * | 2002-06-10 | 2003-04-23 | 中山国安火炬科技发展有限公司 | Gravure latent image local holographic comprehensive antifake label |
| CN1423798A (en) * | 2000-04-15 | 2003-06-11 | Ovd基尼格拉姆股份公司 | Pattern |
| CN101326434A (en) * | 2005-09-12 | 2008-12-17 | 超点公司 | Authenticating and identifying objects using nanoparticles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4205773B2 (en) * | 1998-01-28 | 2009-01-07 | 東芝テック株式会社 | Fluorescent ink and recorded information reading device |
-
2010
- 2010-01-15 CN CN201080004704.6A patent/CN102282568B/en not_active Expired - Fee Related
- 2010-01-15 JP JP2010546655A patent/JP5339382B2/en not_active Expired - Fee Related
- 2010-01-15 WO PCT/JP2010/050412 patent/WO2010082625A1/en active Application Filing
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423798A (en) * | 2000-04-15 | 2003-06-11 | Ovd基尼格拉姆股份公司 | Pattern |
| CN2546918Y (en) * | 2002-06-10 | 2003-04-23 | 中山国安火炬科技发展有限公司 | Gravure latent image local holographic comprehensive antifake label |
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| CN102282568A (en) | 2011-12-14 |
| HK1162723A1 (en) | 2012-08-31 |
| JP5339382B2 (en) | 2013-11-13 |
| WO2010082625A1 (en) | 2010-07-22 |
| JPWO2010082625A1 (en) | 2012-07-05 |
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