CN102114743A - Marketable file and method for identifying same - Google Patents
Marketable file and method for identifying same Download PDFInfo
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- CN102114743A CN102114743A CN200910217557XA CN200910217557A CN102114743A CN 102114743 A CN102114743 A CN 102114743A CN 200910217557X A CN200910217557X A CN 200910217557XA CN 200910217557 A CN200910217557 A CN 200910217557A CN 102114743 A CN102114743 A CN 102114743A
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Abstract
The invention relates to a marketable file and a method for identifying the same, and the marketable file and the method belong to the technical field of anti-counterfeiting of safe articles such as bank notes, certificates, magnetic cards, marketable bills, and the like. The invention discloses a marketable file which comprises a marketable file substrate and at least one electroluminescent substance for inspecting the marketable file, wherein the electroluminescent spectrums generated by the electroluminescent substance respectively under the excitations of electric fields of at least two types of characteristic frequencies have different spectral shapes, and the electroluminescent substance is combined with the marketable-file substrate in a code form. Based on the same principle, the invention also discloses a method for identifying the marketable file. Based on the particular relationship determination, the purpose of identifying the marketable files by using electroluminescence is achieved, so that the identification on the marketable files is simpler, more accurate and easier to realize.
Description
Technical field
The present invention relates to the field of anti-counterfeit technology of value documents such as banknote, certificate, magnetic card, bill, relate in particular to a kind of method and a kind of marketable securities that are used to identify the value document true and false with safety element of anti-counterfeiting characteristic.
Background technology
At present, the adulterator more and more is easy to utilize the high-tech technology, as color copy machine, advanced person's imaging system and printing technology, makes important value document, security and vouchers such as forged banknote, passport, admission ticket and identity card.The threshold of current holographic security technology and photochromatic printing ink technology is more and more lower, and false proof effect is also weakened gradually.In addition, common anti-counterfeiting technology such as various visible fluorescence are false proof, and anti-counterfeiting technologies such as temperature induced color changing also obtain from the market easily, and anti-counterfeiting technology is decrypted gradually.Therefore, also more and more higher to the requirement that marketable securities such as false proof requirement, particularly banknote are false proof.
Patent CN1105654 is entitled as in " product that has the assignment and the safety of light-emitting component " and has proposed electroluminescent technology in false proof field, particularly is applied in marketable securities such as banknote, check, and the application of other negotiable bills or the like.This method utilization be more common electroluminescent technology, the frequency of its electroluminescent luminescent spectrum and excitaton source does not have specific relation.Yet along with the false proof rank demand to marketable securities is more and more higher, the luminous anti-counterfeiting technology of electroluminescent also needs continuous lifting.
Patent CN 1806078 " has the valency document being arranged and being used to make the method that this has the valency document of a safety element " and discloses electroluminescent pigment and wrapped up by a photoactive layer, thereby make electroluminescent spectrum have a less bandwidth, perhaps realize the electroluminescent spectrum that some are special, help to improve the forgery threshold of electroluminescent anti-counterfeiting technology like this, and make things convenient for reading of machine high precision.
Luminous also have a key character except luminous intensity and spectral signature, be luminescent lifetime, can not disappear immediately after its expression fluorescence produces, but the gradually process of decay is arranged in time.For electro optical phenomenon, lot of documents shows, luminescent lifetime also is an important parameter in the electroluminescent process, its length is directly connected to the electroluminescent power of this centre of luminescence, when luminescent lifetime was complementary with the cycle that excites electric field, the electroluminescent intensity of this centre of luminescence correspondence reached maximum.Thereby, excite the variation of the variable effect luminescent spectrum of electric field frequency.
For example, " light emission and light that the frequency of electroluminescent powder ZnS:Cu causes are buried in oblivion (Frequecy-dependent lightemission and extinction of electroluminescent ZnS:Cu phosphor) " Display, 28, introduced zinc sulphide among the 112-117 (2007) and mixed copper, can realize glaucous electroluminescent by suitable doping content and synthetic reaction condition.Electroluminescent spectrum shows that the Gaussian function by four peak positions is formed by stacking, and is respectively 448nm, 471nm, 504nm, 550nm.The frequency influence that excites electric field is to the luminous efficiency of each peak position correspondence, and in general, the frequency of electric field is high more, and shortwave luminous is that the electroluminescent of blue color is easy excitated, and the frequency of electric field is low more, and long wave luminous is that the electroluminescent of green color is easy excitated.Result of study shows, under the high-frequency situation, than the blue light that is easier to fluorescence excitation life-span weak point, under the low frequency situation, than being easier to long green glow of fluorescence excitation life-span.Similar result is report in document " is controlled variable color electroluminescent device and mechanism research (spectroscopy and spectrum analysis; 26; 23-26; 2006) frequently " also, this article has been studied at zinc sulphide and has been mixed the centre of luminescence Cu that fluorescence lifetime differs greatly, Mn, the variation of exciting field frequency makes the emission spectrum of device that variation take place, the variation of frequency has changed the number of times that the different life-span centres of luminescence are excited in the unit interval.
By size, dopant material and the concentration of control luminescent powder particle, the technology that the preparation luminescent powder is taked, regulate the luminescent lifetime of electroluminescent specific wavelength correspondence, thereby the electric field of realizing frequency change excites down the electroluminescent spectrum shape that specific variation takes place.
Summary of the invention
At the defective in the above-mentioned field, the invention provides a kind of value document, excite the electric field frequency variation to realize that electroluminescent spectrum changes, identify the true and false of marketable securities with this to realize utilizing with anti-counterfeiting characteristic, make the true and false of identifying marketable securities promptly simple, also accurately realize with being easy to.
In view of this, the present invention also provides a kind of method that is used to identify the value document true and false, excites the electric field frequency variation to realize that electroluminescent spectrum changes to realize utilizing, and identifies the true and false of marketable securities with this, make the true and false of identifying marketable securities promptly simple, also accurately realize with being easy to.
A kind of value document, at least a electroluminescent property material that it has the value document substrate and is used to check this value document authenticity, this electroluminescent substance combines with the value document substrate with the form of coding, it is characterized in that, this electroluminescent property material excites down at the electric field of two kinds of characteristic frequencies at least, and the electroluminescent spectrum of Chan Shenging has spectral shape inequality respectively.
Be provided with two code areas that contain the electroluminescent property material in the described value document, under the exciting of a certain characteristic frequency electric field, two code area colour developings are identical or approximate, and under the exciting of another feature frequency electric field, two code area colour developings are obviously different.
Described coding refers to a kind of this electroluminescent property material, and the material that perhaps has this electroluminescent feature with other perhaps spatially forms figure with the material that does not have this electroluminescent feature.
Described coding comprises bar code, two-dimension code, three-dimensional sign indicating number, figure or character; The preferred stripe font code.
The luminescent spectrum of described electroluminescent property material is 200nm-3 μ m, preferred 380nm-760nm.
Described electroluminescent property material is to be to mix the II-VI compound of impurity or/and BaAlS.
The described II-VI compound that mixes impurity is ZnS, ZnSe, SrS, CaS or the CdS that is mixed with a kind of or its combination in Cu, Ag, Au, P, As, Pb, Fe, the Mn ion; Preferably mix Cu or/and Mn or/and the ZnS of Au ion.
Contain halogens Cl, Br, I in the described II-VI compound that mixes impurity, or trivalent ion Al, Ga, In.
Described electroluminescent property material is coated by protective layer.
Described electroluminescent property material is coated by a photoactive layer, described photoactive layer one deck at least is that inorganic material constitutes, and described inorganic material is metal or half-metal oxide, metal or semimetal nitride, metal or semimetal oxysulfide, metal or semimetal sulfide or is doped with metal or semimetallic metal or semimetal sulfide.
Described combination refers to that the anti-forgery ink that contains the electroluminescent property material adopts the mode of serigraphy, intaglio printing, letterpress, offset printing or ink jet printing to be printed in the value document substrate.
The granule size of described electroluminescent property material is 0.2 μ m-35 μ m.
Also contain solvent and/or auxiliary agent and/or bond in the described anti-forgery ink.
Also contain organic pigment and/or other anti-fake material in the described anti-forgery ink.
Described anti-fake material is infrared absorbing material, infrared up-conversion material, fluorescent material, magnetic material, liquid crystal material, optically variable pigments (OVI) or pearlescent pigment; Preferred colourless ultraviolet fluorescent material.
Add in the described anti-forgery ink BaTiO of particle diameter less than the high-k of 40 μ m arranged
3And/or SrTiO
3
Described in conjunction with adopting the intaglio printing mode to be printed in the value document substrate, adding in the described anti-forgery ink has TiO
2Particle.
Described combination is to join in the fiber in the process that value document forms, or the electroluminescent property material is made in the form affix value document of safety line.
Identify the method for this value document, the first step uses the electric field that excites of at least two frequencies to excite the suprabasil electroluminescent property material of value document; In second step, the variation of frequency causes that the electroluminescent spectrum shape of property material changes; In the 3rd step, when the variation of spectral shape and predefined meeting, announce that this value document is a genuine piece.
The described wavelength that excites electric field is a wavelength in the electroluminescent spectrum scope; Preferred electroluminescent spectrum resolves into the wavelength of the peak position correspondence of one or more Gaussian function stacks.
The AC field that the described alternating voltage that excites electric field to be meant that positive and negative electrode alternately changes causes.
Described frequency range is 50Hz-50KHz, preferred 200Hz-5KHz.
The present invention relates to a kind of value document,, cause that by the frequency change that excites electric field the color of electroluminescent property material reacts electroluminescent luminescent lifetime, thereby reach false proof purpose based on the luminescent lifetime of electroluminescent property material.
Two code areas preferably are set in value document, under a frequency colour developing of two code areas identical or approximate, following two code areas colour developing of another frequency is different, two code areas are used, to reach false proof effect.
The electroluminescent property material can form various coded system in value document, preferably adopt the mode of bar code.
Zinc sulfide crystal mainly contains two kinds of crystalline phases, and a kind of is a cube phase, and another is the hexagon phase, and in general, hexagon is compared the easier growth of cube phase, under two kinds of crystalline phases, electro optical phenomenon is arranged all.Wherein the energy gap of six side's phases is 3.7eV, and the energy gap of cube phase is 3.64eV.Can be luminous after zinc sulphide is activated, active ions mainly contain: Cu, Ag, Au, P, As, Pb, Fe, Mn etc., these active ions are limited in the solubility of zinc sulphide, need mix other compositions and strengthen solubility, these compositions mainly are halogens Cl, Br, I and trivalent ion Al, Ga, In etc., and these co-activation compositions also play the effect of auxiliary light emission.The implementation method of electroluminescent color has many kinds, and their luminescent lifetime is also had nothing in common with each other.
Such as: zinc sulphide mixes Cu can produce blue and green electroluminescent, and under the condition of low concentration, electroluminescent color mainly is blue color, and under the concentration conditions of higher, electroluminescent moral color mainly is green.Document has reported that also under the condition of temperature greater than 1000 degree, under the HCl atmosphere of high concentration, the green emitting center is easy to form, and under the low concentration, the blue-light-emitting center is easy to form.Document Semicond.Sci.Technol.18 (2003) 512-516 further specifies, and in general, the position of relative intensity and glow peak is by the decision of the growth conditions of electroluminescent material.Therefore, can be by in the process of preparation electroluminescent powder, various technological parameters such as the temperature of conditioned reaction, atmosphere influence the growth conditions of electroluminescent material, thereby obtain the electroluminescent pigment of special intensity and glow peak position.The electroluminescent pigment of growing under these different levels of doping and the technology also can have influence on the luminescent lifetime of the corresponding centre of luminescence.
Certainly, electroluminescent matrix not only is confined to zinc sulphide, its mesostroma comprises multiple II-VI compound and composition thereof, and for example zinc selenide (ZnSe), strontium sulfide (SrS), calcium sulfide (CaS) or chromic sulfide also have the electroluminescent matrix of recent findings such as BaAlS in addition.
The light emitting region of electroluminescent property material of the present invention comprises 200 nanometers to the 3 micron related light emitting region of whole electroluminescent except visible light.Preferred 380nm-760nm.
The electroluminescent property material can select an inorganic compound or organic compound to coat as protective layer material, preventing pigment deliquescence or oxidation, and toxigenicity.
Described electroluminescent property material can be coated by a photoactive layer, in this photoactive layer at least one deck be that inorganic material constitutes, this inorganic material preferable alloy or half-metal oxide, nitride, oxysulfide, sulfide or (being total to) is doped with metal or semimetallic this class material constitutes, thus realize special electroluminescent spectrum feature.
The associated methods of described electroluminescent property material and value document is a mode of printing, as serigraphy, intaglio printing, mode of printings such as letterpress, offset printing or ink jet printing, realization contains anti-forgery ink the laying at value document of electroluminescent property material.
For be suitable for the printing, electroluminescent granular size generally select average diameter be D50 less than 30 microns, this size generally satisfies screen printing mode; For the gravure printing mode, the granular size of electroluminescent powder is generally less than 10 microns, and the mode of printing granular size of protruding seal is generally less than 5 microns; The mode of printing of offset printing, granular size is less than 3 microns.Because the more intense electroluminescent luminescent properties of influence of granular size therefore for mode of printing, should be selected moderate particle diameter, rather than painstakingly selects especially little luminous pigment.The granule size of electroluminescent property material is selected 0.2 μ m-35 μ m for use.
Also include solvent and/or auxiliary agent and/or bond in the anti-forgery ink, to adapt to the needs that print and be combined with value document.
Can also comprise colored pigment in the anti-forgery ink, be made into false proof required color.
Can also comprise other anti-fake material in the anti-forgery ink, as infrared absorbing material, infrared up-conversion material, fluorescent material, magnetic material, liquid crystal material, optically variable pigments (OVI), pearlescent pigment etc., preferred colourless ultraviolet fluorescent material.
Can also comprise the BaTiO3 of particle diameter in the anti-forgery ink less than 40 microns high-k, materials such as SrTiO3, perhaps other metal materials form the field and move element, help exciting electroluminescent pigment luminous.
In order to observe the feature of electroluminescent spectrum more clearly, so that the true and false that the operator can visual and accurate evaluation value document along with frequency change.The exciting field of frequency change causes that it is proper mode that the electroluminescent pigment of spectrum change and the electroluminescent pigment that exciting field does not cause spectrum change are used.
For example, the pigment in two kinds of electroluminescent printing ink, wherein a kind of printing ink is to mix Mn and Cu in the zinc sulphide matrix, and the pigment in another printing ink is to mix Mn in the zinc sulphide matrix.Because the luminescent lifetime difference of Mn, two kinds of centres of luminescence of Cu, the electric field that frequency is lower than 150Hz excites down, and the Mn centre of luminescence is activated easily, and the Cu centre of luminescence is not easy to activate, electroluminescent mainly is that the transition of Mn Validation Counter causes that the color of two kinds of electroluminescent pigment is about the same; Increase along with the exciting field frequency, the Cu centre of luminescence is activated gradually, when the electric field of frequency greater than 5000Hz excites down, the emission spectra of Cu centre of luminescence correspondence is more and more stronger, the electroluminescent color that zinc sulphide is mixed Mn and Cu moves to shortwave gradually, the electroluminescent pigment of mixing Mn with zinc sulphide forms tangible contrast, exactly because the luminescent lifetime difference of this Mn, two kinds of centre of luminescence correspondences of Cu causes.By observing emission spectrum, thereby determine the difference of the luminescent lifetime of luminous pigment, differentiate the true and false of electroluminescent pigment on this basis, thereby the authenticity of value document is differentiated with the exciting field frequency change.
In fact, electroluminescent pigment generally all has the characteristic of luminescence generated by light, and the spectral signature under the optical excitation and the high-frequency electric field spectral signature under exciting is more approaching.Mix Cu and Mn and zinc sulphide as the above-mentioned zinc sulphide of mentioning and mix Mn color under optical excitation and be respectively, the former is green partially, and the latter is yellow partially, and the former luminescent spectrum comprises the latter's spectrum.In order to make the adulterator difficult discovering the difference of this luminescent lifetime, can in mixing the electroluminescent pigment of Mn, zinc sulphide add the green luminous pigment of colorless fluorescent, make that the fluorescence color of two kinds of printing ink is almost approaching under ultraviolet excitation, human eye is difficult to differentiate.The luminous printing ink that this pairing is used has several characteristic, and under ultraviolet excitation, color is almost consistent, excite down at LCF, color is basically identical also, excites down at high-frequency electric field, color demonstrates evident difference, by these features, can differentiate the true and false of value document.
In addition, for the gravure ink that makes the electroluminescent color-change that frequency relies on has higher hidden function, can add the very little UV absorption transparent pigment of an amount of particle diameter, as the fine particle of TiO2, under ultraviolet excitation, because the effect of UV absorption pigment, can not excite electroluminescent pigment to launch fluorescence, yet excite down at electric field, the UV absorption transparent pigment can be not bigger influences the electric field excitaton source, and electroluminescent can be normally luminous.
The electric field that excites of frequency change causes the electroluminescent material that electroluminescent spectrum changes, application is except adding to pigment the mode of printing in the printing ink, also be included in and join paper, join fiber, be prepared into forms such as safety line and be applied to the false proof of value document.
For example, variable color electroluminescent paper, in the paper forming process, the electro-luminescent particles of two kinds of different qualities of directed dispensing.By applying electric field, when frequency changes, the situation that other electric field parameters are constant can find that the color of different electro-luminescent particles changes.Particularly, can be implemented in certain frequency and excite down, the glow color of two kinds of light-emitting particles is the same; Change frequency to a certain value, obvious variation will take place in color.
Variable color electroluminescent safety line, coated heat melten gel on the PET film of aluminizing, and reserving not coated heat melten gel of abundant position somewhere, purpose is in order to guarantee that electrode can contact with the aluminium coated on the PET.Then, in the melten gel position, by heat treatment light-emitting particles and PET film are bonded together afterwards.This film is cut required width obtain the luminous safety line of variable color.Detector by suitable applies electric field, and when frequency changes, the situation that other electric field parameters are constant can find that the color of different electro-luminescent particles changes.Particularly, can be implemented in certain frequency and excite down, the glow color of two kinds of light-emitting particles is the same; Change frequency to a certain value, obvious variation will take place in color.
Identify the method for this value document, the first step uses the electric field that excites of at least two frequencies to excite the suprabasil electroluminescent property material of value document; In second step, the variation of frequency causes that the electroluminescent spectrum shape of property material changes; In the 3rd step, when the variation of spectral shape and predefined meeting, announce that this value document is a genuine piece.
The specific wavelength that excites electric field to produce is the needs according to the value document authenticity, selects a wavelength in the electroluminescent spectrum scope, and preferred electroluminescent spectrum resolves into the wavelength of the peak position correspondence of one or more Gaussian function stacks.
The AC field that the described alternating voltage that excites electric field to be meant that positive and negative electrode alternately changes causes, described frequency is meant 50Hz-50KHz, preferred 200Hz-5KHz scope.
In machine-readable process, according to the be stimulated influence of source frequency of electroluminescent emission spectrum, so can detect electroluminescent spectrum with the influence that excites electric field frequency to change by before photo-detector, adding optical filter when.
Utilize the present invention, by at the surface printing of the carrier of value document or be embedded at least one safeguard construction, this safeguard construction comprises the electroluminescent property material of a specific luminescent lifetime at least, this electroluminescent property material can excite at the electric field of specific change down, specific variation takes place in emission spectrum, this specific relation is judged, has realized utilizing electroluminescent to identify the true and false of value document, makes the true and false of identifying marketable securities simple more, accurately and be easy to realize.
The printing ink pairing of the present invention by two kinds of different colours variation characteristics used, thereby simpler, accurately and the mode value document that is easy to realize false proof.
Description of drawings
Fig. 1 is the method flow diagram of the evaluation marketable securities true and false provided by the invention;
Fig. 2 represents that zinc sulphide mixes the variation of Mn and Cu emission spectrum under the exciting of the AC field of frequency change, and solid line is represented 400Hz, and dotted line is represented the frequency of 4000Hz correspondence, and electric-field intensity is about.
Fig. 3 represents that zinc sulphide mixes the variation of Mn emission spectrum under the exciting of the AC field of frequency change, and solid line is represented 400Hz, and dotted line is represented the frequency of 4000Hz correspondence, and electric-field intensity is about.
Fig. 4 represents the front elevation of a banknote, adopts ZnS:Mn in main scape figure position, and two kinds of electroluminescent pigment of Cu and Zns:Cu are with the printing of gravure mode.Frequency is that the electric field of 400Hz excites down, because two kinds of spectrum difference that luminous pigment sent are little, what main scape figure can be complete presents.
The front elevation of Fig. 5 presentation graphs 4 described banknotes, frequency are that the electric field of 4000Hz excites down, because two kinds of spectrum difference that luminous pigment sent are bigger, main scape figure has tangible contrast in the position of printing different printing ink.
Fig. 6 represents the back view of a banknote, adopts ZnS:Mn in denomination position, the lower right corner, and two kinds of electroluminescent pigment of Cu and Zns:Cu are printed with screen printing mode.Frequency is that the electric field of 400Hz excites down, because two kinds of spectrum difference that luminous pigment sent are little, what lower right corner denomination can be complete presents.
Fig. 7 represents the back view of a banknote, and frequency is that the electric field of 4000Hz excites down, because two kinds of spectrum difference that luminous pigment sent are bigger, lower right corner denomination has tangible contrast in the position of printing different printing ink.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Core content of the present invention is: a kind of value document and the method that detects this value document authenticity, this value document is encoded based on electroluminescent luminescent lifetime feature, cause by the frequency change that excites electric field that electroluminescent spectrum changes and react electroluminescent luminescent lifetime feature, thereby detect the coding characteristic on the value document, reach the antifalse effect of value document, realize that in like manner the true and false of value document is differentiated.
The variation of the electroluminescent spectral signature that the electric field that changes for observed frequency excites, the electroluminescent substance pairing of the preferred two kinds of luminescent lifetime features of a simple coded system is used.Two kinds of electroluminescent substance that for example have the different frequency response are mixed with the same one side that printing-ink is printed on same value document, and the spectrum of this electroluminescent property material emission is at visible-range.Two kinds of color of ink are made into unanimity or very approaching under the visible light, and human eye is difficult for discovering.In some cases, because two kinds of electroluminescent printing ink are under ultraviolet excitation, color has fine difference, produces the colorless fluorescent powder of fluorescence by adding a spot of burst of ultraviolel, makes two kinds of electroluminescent printing ink excite at uviol lamp that color is about the same down.In order to make the adulterator be difficult for discovering this coding form, under common electroluminescent testing conditions, when being the 400Hz left and right sides as frequency, glow color is consistent or very approaching under the electroluminescent substance electric field excitation that uses in the coding, and under the electric field excitation of another one frequency such as 4000Hz, sends the light of different colours, the mode that pairing is used, no matter be that human eye or machine read, all be easy to detect coding, thereby differentiate the true and false of value document.
As shown in Figure 1, Fig. 1 is the method flow diagram of the evaluation marketable securities true and false provided by the invention, and this method may further comprise the steps:
Step 101: the AC field of frequency change or electron source excite the coding region of value document;
Step 102:,, announce that this value document is a genuine piece if satisfy specific variation relation along with the variation of the frequency of AC field or electron source causes the variation of electroluminescent property material emission spectrum.
Excite the marketable securities coding region to comprise described in the above-mentioned steps 101: at least one safeguard construction that excites the marketable securities coding region to comprise with the AC field or the electron source on frequency change ground, the variation of the emission spectrum of this safeguard construction electroluminescent property material, if satisfy specific variation relation
Above-mentioned electroluminescent material is meant that the II-IV compounds of group of doping comprises that doping material among ZnS, ZnSe, SrS, CaS or the CdS comprises as activator and a kind of or any combination among Cu, Au, the Mn comprises halide ion or Tricationic as activator.
Above-mentioned marketable securities are the default free securities that banknote, certificate, magnetic card or prevent forged, and described carrier is made of paper, plastics, composite plastic layer.Adopt serigraphy, engraving or intaglio printing, hectographic printing or letterset to be printed in the same ink lay of described carrier surface; Adopt serigraphy, engraving or intaglio printing, hectographic printing or letterset alternately to be printed in the different ink laies of described carrier surface.
Embodiment 1
Be illustrated in figure 2 as the interior electroluminescent pigment of a kind of printing ink of selecting pairing to use, the material of this pigment is that zinc sulphide is mixed Mn and Cu, Fig. 2 is illustrated in the variation of emission spectrum under the exciting of AC field of frequency change, solid line is represented the luminescent spectrum of 400Hz correspondence, dotted line is represented the luminescent spectrum of the frequency of 4000Hz correspondence, and electric-field intensity is about 10
6-10
7V/m.Figure 3 shows that the interior electroluminescent pigment of another kind of printing ink of selecting pairing to use, the material of this pigment is that zinc sulphide is mixed Mn, Fig. 3 is illustrated in the variation of emission spectrum under the exciting of AC field of frequency change, solid line is represented the luminescent spectrum of 400Hz correspondence, dotted line is represented the luminescent spectrum of the frequency of 4000Hz correspondence, and electric-field intensity is about 10
6-10
7V/m.
Fig. 4 represents that these two kinds of electroluminescent printing ink are printed on the positive main scape figure of banknote by the mode of gravure.Adopt ZnS:Mn, two kinds of electroluminescent pigment of Cu and Zns:Cu in main scape figure position.Frequency is that the electric field of 400Hz excites down, because two kinds of spectrum difference that luminous pigment sent are little, what main scape figure can be complete presents.The front elevation of Fig. 5 presentation graphs 4 described banknotes, frequency are that the electric field of 4000Hz excites down, because two kinds of spectrum difference that luminous pigment sent are bigger, main scape figure has tangible contrast in the position of printing different printing ink.
Embodiment 2
The mode of employing serigraphy is printed the electroluminescent printing ink of two kinds of luminescent lifetimes.Fig. 6 represents the back view of a banknote, adopts ZnS:Mn in denomination position, the lower right corner, and two kinds of electroluminescent pigment of Cu and Zns:Cu are printed with screen printing mode.Frequency is that the electric field of 400Hz excites down, because two kinds of spectrum difference that luminous pigment sent are little, what lower right corner denomination can be complete presents.
Fig. 7 represents the back view of a banknote, and frequency is that the electric field of 4000Hz excites down, because two kinds of spectrum difference that luminous pigment sent are bigger, lower right corner denomination has tangible contrast in the position of printing different printing ink.
Claims (28)
1. value document, at least a electroluminescent property material that it has the value document substrate and is used to check this value document authenticity, this electroluminescent substance combines with the value document substrate with the form of coding, it is characterized in that, this electroluminescent property material excites down at the electric field of two kinds of characteristic frequencies at least, and the electroluminescent spectrum of Chan Shenging has spectral shape inequality respectively.
2. value document according to claim 1, be provided with two code areas that contain the electroluminescent property material in the described value document, under the exciting of a certain characteristic frequency electric field, two code area colour developings are identical or approximate, under the exciting of another feature frequency electric field, two code area colour developings are obviously different.
3. value document according to claim 1 and 2, described coding refer to a kind of this electroluminescent property material, and the material that perhaps has this electroluminescent feature with other perhaps spatially forms figure with the material that does not have this electroluminescent feature.
4. value document according to claim 1 and 2, described a kind of or its combination that is encoded in bar code, two-dimension code, three-dimensional sign indicating number, figure, the character;
5. value document according to claim 4, the described bar code that is encoded to.
6. value document according to claim 1 and 2, the luminescent spectrum of described electroluminescent property material are 200nm-3 μ m.
7. value document according to claim 6, the luminescent spectrum of described electroluminescent property material are 380nm-760nm.
8. value document according to claim 1 and 2, the luminescent spectrum of described electroluminescent property material are that described electroluminescent property material is to be to mix the II-VI compound of impurity or/and BaAlS.
9. value document according to claim 8, the described II-VI compound that mixes impurity are ZnS, ZnSe, SrS, CaS or the CdS that is mixed with a kind of or its combination in Cu, Ag, Au, P, As, Pb, Fe, the Mn ion;
10. value document according to claim 9, preferably mix Cu or/and Au or/and the ZnS of Mn ion.
11., contain halogens Cl, Br, I in the described II-VI compound that mixes impurity, or trivalent ion Al, Ga, In according to claim 9 or 10 described value documents.
12. value document according to claim 1 and 2, described electroluminescent property material is coated by protective material.
13. value document according to claim 1 and 2, described electroluminescent property material is coated by a photoactive layer, described photoactive layer one deck at least is that inorganic material constitutes, and described inorganic material is metal or half-metal oxide, metal or semimetal nitride, metal or semimetal oxysulfide, metal or semimetal sulfide or is doped with metal or semimetallic metal or semimetal sulfide.
14. value document according to claim 1 and 2, described combination refer to that the anti-forgery ink that contains the electroluminescent property material adopts the mode of serigraphy, intaglio printing, letterpress, offset printing or ink jet printing to be printed in the value document substrate.
15. value document according to claim 14, the granule size of described electroluminescent property material are 0.2 μ m-35 μ m.
16. value document according to claim 14 also contains solvent and/or auxiliary agent and/or bond in the described anti-forgery ink.
17. value document according to claim 14 also contains organic pigment and/or other anti-fake material in the described anti-forgery ink.
18. value document according to claim 17, described other anti-fake material are infrared absorbing material, infrared up-conversion material, fluorescent material, magnetic material, liquid crystal material, optically variable pigments (OVI) or pearlescent pigment.
19. value document according to claim 18, other anti-fake material are colourless ultraviolet fluorescent material.
20. value document according to claim 14, adding in the described anti-forgery ink has BaTiO3 and/or the SrTiO3 of particle diameter less than the high-k of 40 μ m.
21. value document according to claim 14, described in conjunction with adopting the intaglio printing mode to be printed in the value document substrate, adding in the described anti-forgery ink has the TiO2 particle.
22. value document according to claim 1 and 2, described combination are to join in the fiber in the process that value document forms, or the electroluminescent property material are made in the form affix value document of safety line.
23. identify the method for the described value document of claim 1, the first step uses the electric field that excites of at least two frequencies to excite the suprabasil electroluminescent property material of value document; In second step, the variation of frequency causes that the electroluminescent spectrum shape of property material changes; In the 3rd step, when the variation of spectral shape and predefined meeting, announce that this value document is a genuine piece.
24. method according to claim 23, the described wavelength that excites electric field are a wavelength in the electroluminescent spectrum scope.
25. method according to claim 23, the described wavelength that excites electric field are the wavelength that electroluminescent spectrum resolves into the peak position correspondence of one or more Gaussian functions stacks.
26. method according to claim 23, the AC field that the described alternating voltage that excites electric field to be meant that positive and negative electrode alternately changes causes.
27. method according to claim 23, described frequency size is 50Hz-50KHz.
28. method according to claim 27, described frequency size is 200Hz-5KHz.
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| CN107633596A (en) * | 2017-08-14 | 2018-01-26 | 深圳怡化电脑股份有限公司 | A kind of method, apparatus and storage medium for identifying bank card |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011745A (en) * | 2011-12-02 | 2014-08-27 | 联邦印刷有限公司 | Identification document having machine-readable zone and document reading device |
| CN106671639A (en) * | 2017-01-25 | 2017-05-17 | 上海先幻新材料科技有限公司 | Secure file containing friction-modulated luminescent compound |
| CN107633596A (en) * | 2017-08-14 | 2018-01-26 | 深圳怡化电脑股份有限公司 | A kind of method, apparatus and storage medium for identifying bank card |
| CN108777110A (en) * | 2018-05-23 | 2018-11-09 | 江苏集萃工业过程模拟与优化研究所有限公司 | The preparation method of electroluminescent anti-false trademark structure |
| CN112689857A (en) * | 2018-09-14 | 2021-04-20 | 捷德货币技术有限责任公司 | Value document system |
| CN112689857B (en) * | 2018-09-14 | 2022-11-01 | 捷德货币技术有限责任公司 | Value document system |
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| Publication number | Publication date |
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| CN102114743B (en) | 2014-11-05 |
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Effective date of registration: 20210406 Address after: 100070 8th floor, building 2, No.5 Zhonghe Road, Fengtai Science City, Fengtai District, Beijing Patentee after: China Banknote Printing Technology Research Institute Co.,Ltd. Patentee after: CHINA BANKNOTE PRINTING AND MINTING Corp. Address before: 100070 science Road 5, Beijing, Fengtai District Patentee before: SECURITY PRINTING INSTITUTE OF PEOPLE'S BANK OF CHINA Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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Address after: 100070 8th floor, building 2, No.5 Zhonghe Road, Fengtai Science City, Fengtai District, Beijing Patentee after: China Banknote Printing Technology Research Institute Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 100070 8th floor, building 2, No.5 Zhonghe Road, Fengtai Science City, Fengtai District, Beijing Patentee before: China Banknote Printing Technology Research Institute Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |