JP2021144528A - Determination system, determination method, and printed matter inspection device - Google Patents

Abstract

To accurately determine authenticity of a printed matter at low cost.SOLUTION: An authenticity determination system performs authenticity determination of a printed matter in which decoloring ink and non-decoloring ink are printed in a dot matrix form on at least one surface of a substrate. The system includes a server device for determining a radiation pattern of an ultraviolet ray on the basis of a first ink pattern of the printed decoloring ink and the non-decoloring ink and a detector for detecting a second ink pattern of the decoloring ink and the non-decoloring ink after the decoloring ink is erased by radiating an ultraviolet ray with the radiation pattern on a part of the decoloring ink and the non-decoloring ink of the printed matter. The server device calculates an ink pattern after the first ink pattern is radiated by an ultraviolet ray with the determined radiation pattern, compares the calculated ink pattern with the second ink pattern to determine authenticity of the printed matter.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a determination system, a determination method, and a photographic paper inspection device.

A cash card is used when a financial institution operates an ATM (automated teller machine) to withdraw cash. Currently, a method of performing authentication by inserting a cash card having a magnetic stripe and recording information such as an account number as magnetic information into an ATM and pressing a 4-digit PIN is widely used.

The magnetic information can be easily read and written by a card reader or the like. Therefore, by taking out information from a genuine cash card and recording it on another card, a counterfeit card that is indistinguishable from a genuine card from an ATM is created and illegally used.

As a countermeasure against such unauthorized use of the card, there is known a card with a built-in IC chip in which an IC chip is mounted on the main body of the magnetic stripe card and different key information is recorded on the IC chip for each card. In addition, some financial institutions have adopted biometric authentication cards that record information used for ecological authentication such as finger vein patterns on IC chips. However, the IC chip is expensive, and there is a problem that the manufacturing of the card is costly. Further, if the IC chip is physically and electrically destroyed and fails, there is a problem that the card cannot be used.

Japanese Unexamined Patent Publication No. 2004-262015

The present disclosure has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a determination system and a determination method capable of accurately determining the authenticity of a printed matter at low cost. Another object of the present disclosure is to provide an inspection device for photographic paper.

The determination system according to the present disclosure is an authenticity determination system for printed matter in which decolorizing ink and non-decolorizing ink are printed in a dot matrix on at least one surface of a base material, and is used for printing on each of a plurality of printed matter. An ultraviolet irradiation pattern that stores the printed matter information in which the identification information of the object and the printed first ink pattern of the decolorizing ink and the non-decoloring ink are associated with each other and irradiates the printed matter to be verified for authenticity. The server device for determining the authenticity, the operation terminal for transmitting the identification information of the printed matter to be determined for authenticity to the server device and acquiring the determined irradiation pattern from the server device, the decoloring ink of the printed matter, and the said A second of the decolorizing ink and the non-decoloring ink after the operation terminal irradiates a part of the non-decoloring ink with an ultraviolet ray in an irradiation pattern acquired from the server device and the decolorizing ink is decolorized. The operation terminal includes a detector for detecting an ink pattern, the operation terminal transmits information on the second ink pattern to the server device, and the server device sends ultraviolet rays to the first ink pattern with a determined irradiation pattern. The ink pattern after irradiation is calculated, the calculated ink pattern is compared with the second ink pattern received from the operation terminal, and the authenticity of the printed matter is determined based on the comparison result.

In one aspect of the present disclosure, the server device determines the irradiation pattern based on the first ink pattern so as to include at least one dot of the decolorizing ink and one dot of the non-decolorizing ink. ..

In one aspect of the present disclosure, when the server device determines that the printed matter is genuine by the authenticity determination, the second ink pattern is associated with the identification information of the printed matter, and in the next authenticity determination, the second ink pattern is associated with the identification information. An irradiation pattern was determined based on the second ink pattern, an ink pattern after irradiating the second ink pattern with ultraviolet rays with the determined irradiation pattern was calculated, and the calculated ink pattern and the detector detected the calculated ink pattern. Compare with the third ink pattern.

In one aspect of the present disclosure, the decolorizing ink and the non-decolorizing ink have the same color.

In one aspect of the present disclosure, the detector has a plurality of light emitting elements that are arranged in a matrix and irradiate ultraviolet rays.

In one aspect of the present disclosure, the first ink patterns of a plurality of printed matter registered in the printed matter information are different from each other.

In one aspect of the present disclosure, the printed matter has an ink pattern printing area in which the decolorizing ink and the non-decoloring ink are printed in a dot matrix shape, a protective layer covering the ink pattern printing area, and the ink. The UV absorption of the protective layer covering the area other than the pattern printing area is different.

In one aspect of the present disclosure, the decolorizing ink is a compound represented by the following structural formula (1), a compound represented by the following structural formula (2), a compound represented by the following structural formula (3), and a compound represented by the following structural formula (3). It is at least one of the compounds represented by the following structural formula (4).

The determination method of the present disclosure is a method for determining the authenticity of a printed matter in which decolorizing ink and non-decolorizing ink are printed in a dot matrix on at least one surface of a base material, and the operation terminal determines the authenticity of the printed image. Based on the step of transmitting the identification information of the object to the server device and the first ink pattern of the decolorizing ink and the non-decoloring ink printed on the printed matter, the server device performs an ultraviolet irradiation pattern. The step of determining and the decolorizing ink after the detector irradiates a part of the decolorizing ink and the non-decoloring ink of the printed matter with ultraviolet rays in the irradiation pattern and the decolorizing ink is decolorized. And the step of detecting the second ink pattern of the non-decolorizing ink, and the server device calculates the ink pattern after irradiating the first ink pattern with ultraviolet rays with the determined irradiation pattern, and the calculated ink pattern. The second ink pattern is compared with the second ink pattern, and the authenticity of the printed matter is determined based on the comparison result.

The printed matter inspection device of the present disclosure is a printed matter inspection device used for determining the authenticity of a printed matter in which decolorizing ink and non-decolorizing ink are printed in a dot matrix shape on at least one surface of a base material. To the operation terminal that transmits the identification information of the printed matter to be verified for authenticity to the server device and acquires the irradiation pattern of ultraviolet rays from the server device, and to a part of the decolorizing ink and the non-coloring ink of the printed matter. A detector that detects the ink patterns of the decolorizing ink and the non-decoloring ink after the operation terminal irradiates ultraviolet rays with the irradiation pattern acquired from the server device and the decolorizing ink is decolorized. The operation terminal transmits information on the ink pattern after the decolorizing ink has been decolorized to the server device.

The determination system of the present disclosure is a system for determining the authenticity of an ID card on which an ink pattern using a decolorizing ink and a non-decoloring ink is printed on at least one surface of a base material, and is a system for determining the authenticity of the ink of the ID card. After irradiating the image pickup data acquisition device that photographs the printed surface of the pattern and acquires the image pickup data, the image pickup data acquired by the image pickup data acquisition device, and the ID card stored in the server device with ultraviolet rays. It is provided with a determination device for comparing with an ink pattern and determining the authenticity of the ID card based on the comparison result.

According to the present disclosure, it is possible to accurately determine the authenticity of a printed matter at low cost.

It is a top view of the card which concerns on embodiment of this disclosure. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3a is a diagram showing an example of an ink pattern, and FIGS. 3b and 3c are diagrams showing an example of an ink pattern after decolorization. It is a schematic block diagram of the authenticity determination system which concerns on the same embodiment. It is a schematic block diagram of an ink pattern detector. It is a functional block diagram of an operation terminal. It is a functional block diagram of a server device. This is a flow for explaining the authenticity determination method according to the same embodiment. It is a figure which shows the example of the ink pattern. It is sectional drawing of a card. FIG. 11a is a diagram showing an example of an ink pattern, and FIGS. 11b and 11c are diagrams showing an example of an ink pattern after decolorization.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

FIG. 1 is a plan view of the card 1 according to the embodiment of the present disclosure, and FIG. 2 is a sectional view taken along line II-II of FIG. 1 (a schematic view of a part of the cross section). The card 1 is, for example, a cash card, and an ink pattern IP using a decolorizing ink 13 and a normal ink (non-decolorizing ink) 14 is printed on a predetermined area R on one surface of the base material 10.

A receiving layer 12 is laminated on one surface of the base material 10 of the card 1. In the region R, the ink pattern IP is printed on the receiving layer 12 by the decolorizing ink 13 and the normal ink 14, and in areas other than the region R, the normal ink 14 is printed on the receiving layer 12. A protective layer 15 is laminated on the receiving layer 12 so as to cover the decolorizing ink 13 and the normal ink 14.

For example, in addition to the area R, an account number, a cardholder's name, and a face image are formed. These characters and images may be formed on the surface of the base material 10 opposite to the surface on which the ink pattern IP is provided.

The base material 10 is made of a synthetic resin such as polyvinyl chloride, polyester, polycarbonate, polyamide, polyimide, cellulose diacetate, cellulose triacetate, polystyrene, acrylic resin, polypropylene, or polyethylene as a base material.

The receiving layer 12 contains a binder resin. As the binder resin contained in the receiving layer 12, a conventionally known resin material that easily accepts decolorizing ink or ordinary ink can be used. For example, polyolefins such as polypropylene, halogenated resins such as polyvinyl chloride or polyvinylidene chloride, polyvinyl acetates, vinyl chloride-vinyl acetate copolymers, ethylene-vinyl acetate copolymers or vinyl resins such as polyacrylic acid esters, Polyesters such as polyethylene terephthalate or polybutylene terephthalate, copolymers of olefins such as polystyrene, polyamide, ethylene or propylene and other vinyl polymers, cellulose resins such as ionomer or cellulose diastase, solvent-based resins such as polycarbonate and acrylic resins. Can be mentioned.

The protective layer 15 is made of a transparent resin material. As the material of the protective layer 15, for example, polyester such as polyethylene terephthalate, polyolefin such as cycloolefin polymer, cellulose resin such as triacetyl cellulose, acrylic resin, polycarbonate and the like can be used.

The decolorizing ink 13 is an ink having a very short decoloring time (easily fading) due to ultraviolet irradiation as compared with the normal ink 14.

The normal ink 14 is an ink having high light resistance, which is less likely to fade than the decolorizing ink 13.

In the present embodiment, the dot pattern of the decolorizing ink 13 and the normal ink 14 is printed in a matrix in the region R to form the ink pattern IP. A plurality of dots are arranged vertically and horizontally, and dots made of the decolorizing ink 13 and dots made of the normal ink 14 are randomly arranged.

The decolorizing ink 13 has the same color as the normal ink 14. ^{Here, the same color means that the color difference ΔE *} ab, which is the difference (distance) between the two colors, is 1.6 or less, preferably 0.8 or less, and more preferably 0.4 or less. Therefore, it is not possible to visually distinguish between the dots made of the decolorizing ink 13 and the dots made of the normal ink 14. In FIG. 1, for convenience of explanation, different hatching is attached to the decolorizing ink 13 and the normal ink 14.

^{When the integrated ultraviolet irradiation energy amount for the decolorizing ink 13 reaches a predetermined value, the color difference ΔE *} ab between the dot portion on which the decoloring ink 13 is printed and the non-ink printing portion (base material 10) becomes 0.6 or less. .. When the color difference ΔE ^* ab is 0.6 or less, the color difference between the dot portion and the base material cannot be visually distinguished, and it can be considered that the decolorizing ink is almost decolorized and the dot portion becomes transparent.

The number and position of dots in the ink pattern IP immediately after production are the same among the plurality of cards 1, but the number and / or position of dots by the decolorizing ink 13 is different for each card. That is, the dot pattern by the decolorizing ink 13 is a pattern unique to each card 1. For example, the ink pattern IP is printed on demand by a thermal transfer method.

However, as described above, since the dots produced by the decolorizing ink 13 and the dots produced by the normal ink 14 cannot be visually distinguished, the ink pattern IPs of the plurality of cards 1 immediately after production appear to be the same as each other. ing.

FIG. 3a shows an example of the ink pattern. In this ink pattern IP1, 10 locations of I_A, I_D, II_B, II_D, III_A, III_C, IV_B, IV_C, V_A, and V_D out of a matrix of 4 columns (A to D) and 5 columns (IV) horizontally. Dots with the decolorizing ink 13 are printed on the surface. Dots with normal ink 14 are printed in the other 10 places. The grid-shaped broken lines are for convenience of explanation and are not printed on the actual card 1. In this example, visually, 20 dots of the same color appear to be printed.

In the present embodiment, when a security code is input by the cardholder, ultraviolet rays are applied to a predetermined location. Whether the card 1 is a genuine card or a forged card based on whether or not the dots of the decolorizing ink 13 are decolorized by the ultraviolet irradiation and whether or not the dots of the normal ink 14 remain. , Performs authenticity judgment.

For example, as shown in FIG. 3b, ultraviolet rays are irradiated to two locations, II_B and II_C. Since the dots of II_B are printed by the decolorizing ink 13, they are decolorized. Since the dots of II_C are usually printed by the ink 14, they remain without being erased. The authenticity of the card is determined based on the ink pattern IP2 after ultraviolet irradiation.

The reason why both the dots made of the decolorizing ink 13 and the dots made of the normal ink 14 are irradiated with ultraviolet rays is to prevent counterfeit cards. For example, when irradiating only the dots of the decolorizing ink 13 with ultraviolet rays, the ink pattern after the irradiation with the ultraviolet rays becomes the same between the genuine card and the counterfeit card with the dots of the decolorizing ink 13 printed on all 20 places. It ends up. By irradiating the dots with the normal ink 14 with ultraviolet rays, it is possible to make the decoloring pattern different from that of the counterfeit card in which the dots of the decolorizing ink 13 are printed in all 20 places.

As shown in FIG. 4, the authenticity determination system 100 that determines the authenticity of the card 1 includes a pattern detector 2, an operation terminal 3, and a server device 4. The operation terminal 3 is communicably connected to the pattern detector 2 and the server device 4.

As shown in FIG. 5, the pattern detector 2 includes a light irradiation unit 2A, a pattern detection unit 2B, and transport units 23 and 26. The light irradiation unit 2A has a plurality of light emitting elements 21. The light emitting element 21 irradiates, for example, ultraviolet rays. A plurality of light emitting elements 21 are arranged in a matrix so as to correspond to the ink printing portions (dot portions) of the ink pattern IP. For example, as shown in FIGS. 3a and 3b, when there are 20 places (= 4 × 5) on which ink is printed, 20 light emitting elements 21 (= 4 × 5) are also provided.

It is preferable to provide a shielding plate 22 between the light emitting elements 21 so that each dot of the ink pattern IP is irradiated with ultraviolet rays only from the corresponding light emitting elements 21 and not irradiated with ultraviolet rays leaked from the other light emitting elements 21. ..

The pattern detection unit 2B includes a photographing unit 24 and a visible light source 25. The photographing unit 24 is, for example, a CCD camera.

The transport units 23 and 26 have rollers, a transport belt, and the like, and transport the card 1 in the pattern detector 2.

The card 1 inserted into the pattern detector 2 via the insertion port 20A is conveyed to the light irradiation unit 2A by the transfer unit 23. The light irradiation unit 2A irradiates the ink pattern IP (first ink pattern) of the card 1 with ultraviolet rays in the irradiation pattern instructed by the operation terminal 3. The decolorizing ink 13 irradiated with ultraviolet rays is decolorized.

The card 1 irradiated with ultraviolet rays by the light irradiation unit 2A is conveyed to the pattern detection unit 2B by the transfer units 23 and 26. The photographing unit 24 photographs the ink pattern of the card 1 (the second ink pattern after a part of the decolorizing ink is decolorized by irradiation with ultraviolet rays). The visible light source 25 illuminates the card 1 during shooting by the shooting unit 24.

After shooting, the card 1 is ejected through the ejection port 20B.

Next, the operation terminal 3 will be described. The operation terminal 3 is a computer including a display unit, a central processing unit (CPU), a storage unit, and the like, and a personal computer, a smartphone, a tablet terminal, or the like can be used. The storage unit is a hard disk, a semiconductor memory, or the like, and stores programs, data, and the like necessary for the CPU to execute various processes. By executing the program stored in the storage unit by the CPU, as shown in FIG. 6, the card information input unit 31, the card information transmission unit 32, the irradiation pattern information receiving unit 33, the irradiation control unit 34, and the ink pattern information The functions of the receiving unit 35, the ink pattern information transmitting unit 36, and the determination result receiving unit 37 are realized.

The card information input unit 31 accepts input of card information. The card information is, for example, an account number or a security code (personal identification number). For example, card information is input using a touch panel or a keyboard. The account number may be read from the magnetic stripe on the card 1.

The card information transmission unit 32 transmits the input card information to the server device 4 via a network such as the Internet.

The irradiation pattern information receiving unit 33 receives the irradiation pattern information from the server device 4. The irradiation pattern information indicates which of the light emitting elements 21 of the light irradiation unit 2A emits ultraviolet rays.

The irradiation control unit 34 controls the light irradiation unit 2A and instructs the ultraviolet irradiation pattern based on the irradiation pattern information.

The ink pattern information receiving unit 35 receives information on the ink pattern after the part of the decolorizing ink 13 has been decolorized from the pattern detector 2. For example, as ink pattern information, the photographing unit 24 receives a photographed image of the card 1.

The ink pattern information transmission unit 36 transmits the ink pattern information of the card 1 to the server device 4. The positions of the remaining decolorizing ink 13 and the normal ink 14 may be detected from the captured image by the photographing unit 24, and the detection result may be transmitted to the server device 4 as ink pattern information, or the captured image itself may be transmitted to the server device. You may send to 4.

The determination result receiving unit 37 receives the authenticity determination result of the card 1 from the server device 4. The received determination result is displayed on a display unit such as a liquid crystal display.

Next, the configuration of the server device 4 will be described. As shown in FIG. 7, the server device 4 is a computer including a storage unit 40 in which programs, data, and the like necessary for the CPU to execute various processes are stored. A hard disk, a semiconductor memory, or the like is used for the storage unit 40.

The storage unit 40 stores the account information of each account. The account information includes the account number, the name of the account holder, the set security code, the ink pattern history printed on the issued card 1 (cash card), and the like. The ink pattern history includes information such as the ink pattern first printed on the card 1 and the current ink pattern of the card 1 (which position of the decolorizing ink has already been decolorized).

When the CPU of the server device 4 executes the program stored in the storage unit 40, the card information receiving unit 41, the irradiation pattern determining unit 42, the irradiation pattern information transmitting unit 43, the ink pattern information receiving unit 44, and the determining unit 45 And the function of the determination result transmission unit 46 is realized.

The card information receiving unit 41 receives the card information from the operation terminal 3.

The irradiation pattern determination unit 42 refers to the account information in the storage unit 40 corresponding to the card information received from the operation terminal 3, and determines the ultraviolet irradiation pattern in the present authenticity determination from the current ink pattern of the card 1. .. For example, from the current ink patterns of the card 1, at least one of the decolorizing ink 13 which has not been decolorized and the normal ink 14 are selected, and the ultraviolet irradiation pattern is determined.

The irradiation pattern information transmission unit 43 transmits the irradiation pattern information determined by the irradiation pattern determination unit 42 to the operation terminal 3.

The ink pattern information receiving unit 44 receives the ink pattern information from the operation terminal 3. When the ink pattern information is an image captured by the photographing unit 24, the ink pattern information receiving unit 44 detects the positions of the decolorizing ink 13 and the normal ink 14 remaining after the ultraviolet irradiation from the photographed image.

The determination unit 45 refers to the account information stored in the storage unit 40, and determines whether or not the security code included in the card information received from the operation terminal 3 matches the security code registered in the account information. do.

Further, the determination unit 45 calculates an ideal ink pattern (correct answer pattern) when ultraviolet rays are irradiated to the current ink pattern with the irradiation pattern determined by the irradiation pattern determination unit 42. The determination unit 45 compares the ink pattern information received from the operation terminal 3 with the calculated ideal ink pattern, determines that the card 1 is a genuine card if they match, and if they do not match, it is a counterfeit card. Is determined.

The determination result transmission unit 46 transmits the determination result by the determination unit 45 to the operation terminal 3. The determination result indicates the match / mismatch of the security code and the authenticity of the card 1.

FIG. 8 is a flow for explaining the authenticity determination method of the card 1. For example, the cardholder or the operator operates the operation terminal 3, inputs the account number of the card 1, and inserts the card 1 into the discoloration pattern detector 2. Further, the cardholder operates the operation terminal 3 and inputs the security code (steps S1 and S2).

The operation terminal 3 transmits the card information including the input account number and security code to the server device 4 (step S3). The server device 4 determines whether or not the security code received from the operation terminal 3 matches the registered security code (step S4).

The server device 4 identifies the card 1 from the card information received from the operation terminal 3, extracts the current ink pattern of the card 1 from the account information of the card 1, and determines the ultraviolet irradiation pattern (step S5). The server device 4 transmits the irradiation pattern information to the operation terminal 3 (step S6).

The operation terminal 3 instructs the light irradiation unit 2A on the irradiation pattern (step S7). The light irradiation unit 2A irradiates the ink pattern IP of the card 1 with ultraviolet rays in the instructed irradiation pattern (step S8). After the irradiation with ultraviolet rays, the photographing unit 24 photographs the ink pattern of the card 1 (step S9). The operation terminal 3 acquires the captured image (step S10).

The operation terminal 3 transmits the ink pattern information (the photographed image or the ink printing position detected from the photographed image) after the decolorizing ink 13 is decolorized by the irradiation of ultraviolet rays to the server device 4 (step S11).

The server device 4 calculates the ideal ink pattern (correct answer pattern) when the current ink pattern of the card 1 registered in the account information is irradiated with ultraviolet rays by the irradiation pattern transmitted to the operation terminal 3, and the calculation result is obtained. , The authenticity of the card 1 is determined by comparing with the ink pattern received from the operation terminal 3 (steps S12 and S13). When the server device 4 transmits the determination result to the operation terminal 3, the determination result is displayed on the display unit of the operation terminal 3 (steps S14 and S15).

The server device 4 updates the current ink pattern of the card 1 in the account information with the latest ink pattern (step S16). The latest ink pattern is the pattern after ultraviolet irradiation in step S8, or the ideal ink pattern calculated in step S12.

For example, in the case of the card 1 on which the ink pattern IP1 shown in FIG. 3a is printed, the ink pattern IP1 (No. 1) is used as the first printed ink pattern in the ink pattern history of the account information in the storage unit 40 of the server device 4. 1 ink pattern) is registered.

In the first authenticity judgment process, ultraviolet rays are applied to two places, II_B and II_C. Since the dots of II_B are printed by the decolorizing ink 13, they are decolorized by irradiation with ultraviolet rays, and the ink pattern IP2 shown in FIG. 3b is obtained. The ink pattern IP2 (second ink pattern) is registered in the ink pattern history as the current ink pattern of the card 1.

In the second authenticity determination process, ultraviolet rays are applied to two points, IV_C and IV_D. Since the dots of IV_C are printed by the decolorizing ink 13, they are decolorized by irradiation with ultraviolet rays, and the ink pattern IP3 shown in FIG. 3c is obtained. The ink pattern IP3 (third ink pattern) in which the two dots II_B and IV_C are decolorized is registered in the ink pattern history as the current ink pattern of the card 1. The current ink pattern in the ink pattern history is updated each time the authenticity determination process is performed.

As described above, according to the present embodiment, the ink pattern printed on the card 1 is irradiated with ultraviolet rays using the decolorizing ink and the normal ink, and the ink pattern after the decolorizing ink is decolorized is detected. Since the ink pattern information printed on the card 1 is registered in the server device 4, the ink pattern to be detected can be calculated from the ultraviolet irradiation pattern.

If the detected ink pattern and the calculated ink pattern match, it is determined to be a genuine card. On the other hand, if the detected ink pattern and the ink pattern obtained by calculation do not match, it is considered that the ink pattern printed on the card 1 is not genuine, and the card is determined to be a counterfeit card.

By using the decoloring pattern of the ink printed on the card, it is possible to accurately determine the authenticity of the card. In addition, the cost can be reduced as compared with the IC chip, and the resistance to impact, static electricity, high temperature, etc. can be increased.

A recording member such as a magnetic tape or an IC chip may be mounted on the card 1, and the decoloring history information of the decoloring ink of the ink pattern may be registered in the recording member and the server device 4 mounted on the card 1. At the time of the authenticity determination process, the authenticity determination accuracy can be improved by collating the decolorization history information registered in the recording member of the card 1 with the decolorization history information registered in the server device 4. can.

The pattern detector 2 may irradiate ultraviolet rays and detect (photograph) an ink pattern by transporting the card 1 to a predetermined position and then fixing the card 1 or while transporting the card 1 at a predetermined speed. You may go. Further, the card 1 may be fixed and the light irradiation unit 2A and the pattern detection unit 2B may be moved.

In the above embodiment, the configuration in which the light irradiation unit 2A and the pattern detection unit 2B are separately provided in the pattern detector 2 has been described, but the irradiation of ultraviolet rays and the detection of the ink pattern may be performed at the same location. .. The ink pattern may be detected by a change in transmitted light.

In the above embodiment, as shown in FIG. 3a, an example in which dots of the decolorizing ink 13 and the normal ink 14 are arranged at equal intervals in the initial ink pattern IP1 of the card 1 immediately after production has been described, but is shown in FIG. As described above, there may be an ink non-printing portion 50 which is a base color (color of the base material 10) without printing ink. It becomes difficult to determine whether the background color portion in the ink pattern is due to the decoloring ink 13 being decolorized or the ink is not printed from the beginning, and the effect of preventing forgery of the card is enhanced. Can be done.

In the examples shown in FIGS. 3a and 9, the pattern in which the dots of the decolorizing ink 13 and the dots of the normal ink 14 do not overlap has been described, but as shown in FIG. 10, the decoloring ink 13 is placed on the dots of the normal ink 14a. Dots may be overlapped to form an ink pattern IP4 as shown in FIG. 11a. For the dots made only of the normal ink 14b that does not overlap with the dots of the decolorizing ink 13, the same material as the normal ink 14a is used, and the amount of ink applied is increased.

In this case, the reflection density of each dot pattern is preferably the same, and the transmission density of each dot pattern is also preferably the same. That is, the ink application amount is adjusted so that the reflection density of the portion printed by superimposing the decolorizing ink 13 and the normal ink 14a and the reflection density of the portion printed by the normal ink 14b are the same. Further, the ink application amount is adjusted so that the transmission density of the portion printed by superimposing the decolorizing ink 13 and the normal ink 14a and the transmission density of the portion printed by the normal ink 14b are the same.

Since the dots of the decolorizing ink 13 irradiated with ultraviolet rays become transparent, the transmission density of the printing area of the decolorizing ink decreases. Therefore, the transmission density pattern of the ink pattern after irradiation with ultraviolet rays is collated with the server registration pattern to determine the authenticity. It will be possible. The dots of the normal ink 14a and the dots of the normal ink 14b, which can be seen by making the dots of the decolorizing ink 13 transparent, are the dots of the same color visually, but since the transmission densities are different, the authenticity can be determined, and the card can be judged as authentic. The anti-counterfeiting effect can be enhanced.

The grid-like solid lines and broken lines are for convenience of explanation and are not printed on the actual card 1. In this example, 20 dots of the same color are visually printed on the dots of the normal ink 14a, the dots of the normal ink 14b, and the dots of the decolorizing ink 13 that are not decolorized by the ultraviolet rays, which are visible after being decolorized by the ultraviolet rays. However, the transmission density of the dots of the normal ink 14a that can be seen after being decolorized by ultraviolet rays is higher than the transmission density of the dots of the normal ink 14b and the dots on which the decolorizing ink 13 that has not been decolorized by ultraviolet rays is superimposed. small.

In the ink pattern 4 shown in FIG. 11a, of the matrix of 4 columns (A to D) and 5 columns (IV) horizontally, I_A, I_D, II_B, II_D, III_A, III_C, IV_B, IV_C, V_A, V_D Dots on which the decolorizing ink 13 and the normal ink 14a are superimposed are printed at 10 locations. Dots with normal ink 14b are printed in the other 10 places.

As shown in FIG. 11b, ultraviolet rays are applied to two locations, II_B and II_C. Since the dots of II_B are printed by the decolorizing ink 13 and the normal ink 14a, the decolorizing ink 13 is decolorized and the dots of the normal ink 14a become visible. Since the dots of II_C are usually printed with ink 14b, they remain without being erased. The authenticity of the card is determined based on the transmission density pattern of the ink pattern IP5 after ultraviolet irradiation.

In the next authenticity determination process, ultraviolet rays are applied to two points, IV_C and IV_D. Since the dots of IV_C are printed by the decolorizing ink 13 and the normal ink 14a, the decolorizing ink 13 is decolorized by irradiation with ultraviolet rays, and the dots of the normal ink 14a become visible. It becomes.

The ink pattern may be printed using a plurality of types of decolorizing inks having different amounts of UV integrated irradiation energy to be decolorized. For example, an ink pattern is printed using two types of decolorizing inks, a first decoloring ink and a second decoloring ink, which have different amounts of integrated ultraviolet irradiation energy to be decolorized. The server device 4 instructs the operation terminal 3 on the ultraviolet irradiation position and the intensity of the irradiation energy.

When only the first decolorizing ink is to be decolorized, the energy is weakened or the irradiation time is shortened, and the card is irradiated with ultraviolet rays. When both the first decolorizing ink and the second decoloring ink are to be decolorized, the card is irradiated with ultraviolet rays by increasing the energy or lengthening the irradiation time. In this way, by using a plurality of decolorizing inks having different decolorization easiness, it is possible to enhance the anti-counterfeiting effect of the card.

A protective layer having different ultraviolet absorption may be provided in the area R (ink pattern printing area) on which the ink pattern is printed and the area other than the area R in which the face image or the like is printed. For example, the region R is provided with a protective layer having low ultraviolet absorption so that the decolorizing ink can be easily decolorized. A protective layer having high ultraviolet absorption is provided in a region other than the region R to enhance light resistance.

The ink pattern may be provided only on one side of the card 1 or may be provided on both sides.

In the above embodiment, the configuration in which the detected ink pattern and the calculated ink pattern are compared by the server device 4 has been described, but the operation terminal 3 may be used. For example, the server device 4 transmits the calculated ink pattern to the operation terminal 3. The operation terminal 3 notifies the server device 4 of the determination result.

In the above embodiment, an example in which the cardholder inputs the security code has been described, but instead of inputting the security code, identity verification may be performed by means such as fingerprint authentication or iris authentication.

In the above embodiment, an example of printing the decolorizing ink 13 and the normal ink 14 with dots having a circular shape in a plan view is shown, but the shape is not limited to a circle, and may be a rectangle, a triangle, or the like.

The card 1 is not limited to a cash card, but may be a credit card, an ID card, or the like. In the above embodiment, the card on which the ink pattern is printed with the decolorizing ink and the normal ink has been described, but the card is not limited to the card, and can be applied to various printed objects capable of printing the ink pattern. The operation terminal 3 transmits identification information such as an account number, a card number, and an issue number that can uniquely identify the printed matter to the server device 4. The server device 4 stores the printed matter information in which the identification information and the ink pattern are associated with each other.

For example, when the card 1 is an ID card, an ink pattern using decolorizing ink and normal ink is printed on the ID card. The ink pattern may be a matrix of dots or another pattern such as a line pattern. When the contents of the ID card are modified, the ink pattern is changed by irradiating with ultraviolet rays, and the changed ink pattern is saved in the server device. When the identity is confirmed by the ID card, the ID card is photographed by using a camera function of a smartphone or the like, the imaging data is acquired, and the imaging data is transmitted to the server device. The server device detects the ink pattern from the received imaging data, compares it with the stored ink pattern, and determines the authenticity based on the comparison result.

A smartphone or the like may have a determination function instead of the server device. For example, a smartphone or the like may detect an ink pattern from the imaging data, acquire the ink pattern stored in the server device from the server device, and compare these to determine the authenticity.

A print inspection device including a pattern detector 2 and an operation terminal 3 may be built in one device such as an ATM.

Next, the decolorizing ink and the normal ink used for ink pattern printing will be described.

[Decoloring ink]
The decolorizing ink is a dye compound that is extremely easy to decolorize by irradiation with ultraviolet rays. For example, as a compound of the yellow decoloring dye, Solvent Yellow 29 represented by the following structural formula (1) can be mentioned.

Examples of the magenta decolorizing dye compound include Solvent Red 18 represented by the following structural formula (2).

Examples of the cyan decoloring dye compound include Solvent Blue 5 represented by the following structural formula (3) and Solvent Blue 58 represented by the following structural formula (4).

[Normal ink]
Normal ink (non-decolorizing ink) is a light-resistant dye with high light resistance. Examples of light-resistant dyes include diarylmethane dyes, triarylmethane dyes, thiazole dyes, merocyanine dyes, pyrazolone dyes, methine dyes, indian aniline dyes, pyrazolomethine dyes, acetophenone azomethine, pyrazoloazomethine, and imidazole. Azomethine dyes such as azomethin, imidazola azomethin, pyridone azomethin, xanthene dyes, oxazine dyes, cyanostyrene dyes such as dicyanostyrene and tricyanostyrene, thiazine dyes, azine dyes, acrydin dyes, benzeneazo dyes, Azo dyes such as pyridone azo, thiophen azo, isothiazole azo, pyrrol azo, pyrazole azo, imidazole azo, thiadiazol azo, triazole azo, disazo, spiropyran dyes, indolinospiropirane dyes, fluorane dyes, rhodamine lactam dyes, naphthoquinone. Examples thereof include dyes, anthraquinone dyes, and quinophthalone dyes. One type of dye may be contained alone, or two or more types may be contained.

A heat transfer sheet in which the decolorizing ink-containing layer containing the above-mentioned decoloring ink and the normal ink-containing layer containing the normal ink are provided in a surface-sequential manner is prepared, and the decoloring ink is applied from the heat transfer sheet to the receiving layer 12 of the card 1. Is transferred to form an ink pattern, and normal ink is transferred to form a face image or the like. Then, the card 1 can be produced by transferring the protective layer onto the receiving layer 12.

1 Card 2 Pattern detector 2A Light irradiation unit 2B Pattern detection unit 3 Operation terminal 4 Server device 10 Base material 12 Receiving layer 13 Decolorizing ink 14 Normal ink 15 Protective layer IP ink pattern 21 Light emitting element 22 Shielding plate 24 Imaging unit 100 Authenticity Judgment system

Claims (11)

A system for determining the authenticity of a printed matter in which decolorizing ink and non-decolorizing ink are printed in a dot matrix on at least one surface of a base material.
For each of the plurality of printed matter, the printed matter information in which the identification information of the printed matter is associated with the printed decolorizing ink and the first ink pattern of the non-decolorizing ink is stored, and the authenticity is determined. A server device that determines the irradiation pattern of ultraviolet rays to irradiate the printed matter, and
An operation terminal that transmits the identification information of the printed matter to be verified for authenticity to the server device and acquires the determined irradiation pattern from the server device.
A part of the decolorizing ink and the non-decoloring ink of the printed matter is irradiated with ultraviolet rays in an irradiation pattern acquired by the operation terminal from the server device, and the decoloring ink is decolorized. A detector that detects the second ink pattern of the ink and the non-fading ink, and
With
The operation terminal transmits the information of the second ink pattern to the server device, and the operation terminal transmits the information of the second ink pattern to the server device.
The server device calculates an ink pattern after irradiating the first ink pattern with ultraviolet rays with a determined irradiation pattern, and compares the calculated ink pattern with the second ink pattern received from the operation terminal. , A determination system characterized in that the authenticity of the printed matter is determined based on the comparison result. The server device is characterized in that the irradiation pattern is determined based on the first ink pattern so as to include at least one dot of the decolorizing ink and at least one dot of the non-decolorizing ink. The determination system according to 1. The server device
When it is determined by the authenticity determination that the printed matter is genuine, the second ink pattern is associated with the identification information of the printed matter.
In the next authenticity determination, an irradiation pattern is determined based on the second ink pattern, an ink pattern after irradiating the second ink pattern with ultraviolet rays with the determined irradiation pattern is calculated, and the calculated ink pattern and the calculated ink pattern are used. The determination system according to 1 or 2, wherein the third ink pattern detected by the detector is compared with the third ink pattern. The determination system according to any one of claims 1 to 3, wherein the decolorizing ink and the non-decoloring ink have the same color. The determination system according to any one of claims 1 to 4, wherein the detector has a plurality of light emitting elements that irradiate ultraviolet rays arranged in a matrix. The determination system according to any one of claims 1 to 5, wherein the first ink patterns of a plurality of printed matter registered in the printed matter information are different from each other. The printed matter has an ink pattern printing area in which the decolorizing ink and the non-decoloring ink are printed in a dot matrix shape.
The determination system according to any one of claims 1 to 6, wherein the protective layer covering the ink pattern printing area and the protective layer covering an area other than the ink pattern printing area have different ultraviolet absorption properties. The decolorizing ink has a compound represented by the following structural formula (1), a compound represented by the following structural formula (2), a compound represented by the following structural formula (3), and the following structural formula (4). The determination system according to any one of claims 1 to 7, which is at least one of the represented compounds.

A method for determining the authenticity of a printed matter in which decolorizing ink and non-decolorizing ink are printed in a dot matrix on at least one surface of a base material.
The process in which the operation terminal sends the identification information of the stamped object to be verified as authenticity to the server device,
A step in which the server device determines an ultraviolet irradiation pattern based on the first ink pattern of the decolorizing ink and the non-decoloring ink printed on the printed matter.
The detector irradiates a part of the decolorizing ink and the non-decoloring ink of the printed matter with ultraviolet rays in the irradiation pattern, and the decoloring ink and the non-decoloring ink after the decoloring ink is decolorized. The process of detecting the second ink pattern of the ink and
The server device calculates an ink pattern after irradiating the first ink pattern with ultraviolet rays with a determined irradiation pattern, compares the calculated ink pattern with the second ink pattern, and based on the comparison result. The process of determining the authenticity of the printed matter and
Authenticity judgment method including. A photographic paper inspection device used for determining the authenticity of a photographic paper in which decolorizing ink and non-decolorizing ink are printed in a dot matrix on at least one surface of a base material.
An operation terminal that transmits the identification information of the printed matter to be verified for authenticity to the server device and acquires the ultraviolet irradiation pattern from the server device.
A part of the decolorizing ink and the non-decoloring ink of the printed matter is irradiated with ultraviolet rays in an irradiation pattern acquired by the operation terminal from the server device, and the decoloring ink is decolorized. A detector that detects the ink pattern of the ink and the non-fading ink, and
With
The operation terminal is a photographic paper inspection device, characterized in that information on the ink pattern after the decolorizing ink has been decolorized is transmitted to the server device. A system for determining the authenticity of an ID card on which an ink pattern using decolorizing ink and non-decolorizing ink is printed on at least one surface of a base material.
An imaging data acquisition device that photographs the printed surface of the ink pattern of the ID card and acquires imaging data.
The imaging data acquired by the imaging data acquisition device is compared with the ink pattern after irradiating the ID card stored in the server device with ultraviolet rays, and the authenticity of the ID card is determined based on the comparison result. Judgment device and
Judgment system equipped with.

Images