JP2015223766A - Password information printed matter and determination method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for accurately determining a password information printed matter using an infrared ray, by only holding the printed matter in front of a reading window of a reading machine.SOLUTION: A password information forming area 2a and a disturbance light detection area 3a are provided on a surface of an infrared ray reflective substrate 10, a printed image 21 indicating password information is provided on an information forming area, and a hiding layer 22 for covering the printed image, is also provided, and a disturbance light detection layer 31 is provided on the disturbance light detection area, in a password information printed matter 1. The printed image is formed of a black ink which absorbs a far-infrared ray, the hiding layer is formed of the black ink which transmits the far-infrared ray and absorbs or reflects a near-infrared ray, and the disturbance light detection layer is formed of the black ink which transmits the far-infrared ray and absorbs the near-infrared ray. When the printed matter is held in front of the reading window, and when detection density of the disturbance light detection layer is low, the printed matter is made approach to be closer to the reading window for determining possibility of reading of password information.

Description

  The present invention relates to a personal identification information printed matter. The security information printed matter of the present invention can be used to determine the authenticity of these securities, for example, by attaching them to securities and determining the authenticity of the security information printed matter.

  For securities, identification cards or branded or expensive products, counterfeit products may be available on the market. In order to distinguish this counterfeit product from a genuine product, a technique for attaching a forgery prevention mark to the genuine product is well known.

  There are various anti-counterfeit technologies, for example, Patent Document 1 discloses a forgery prevent technology that can be read by infrared irradiation. The anti-counterfeiting technology described in Patent Document 1 distinguishes infrared rays into two types of infrared rays having different wavelengths, and also absorbs the first infrared ray that absorbs both infrared rays and reflects the second infrared ray. The password information printed matter in which the password information is formed by the second ink is used.

  This printed matter can be read by the dedicated reader. That is, this reader incorporates an infrared irradiating device that separately irradiates the first infrared ray and the second infrared ray, and an infrared imaging camera that senses and picks up infrared rays reflected from the personal identification information printed matter. Then, when the personal identification information printed matter is positioned in this reader and irradiated with the first infrared ray, both the first personal identification portion printed with the first ink and the second personal identification portion printed with the second ink Absorbs the first infrared ray and the surrounding substrate is reflected. Therefore, both password portions can be read by the infrared imaging camera. On the other hand, when the second infrared ray is irradiated, the first password printed with the first ink absorbs the second infrared beam, and the second password printed with the surrounding base material and the second ink. Since both are reflected, the first password portion can be read.

  By the way, natural light and room light contain slightly infrared rays. For this reason, when the personal identification information printed matter is exposed to an infrared imaging camera in the presence of natural light or room light, the personal identification information may be read without irradiating infrared rays. For this reason, the anti-counterfeiting technique described in Patent Document 1 discloses a technique for blocking a natural light and a room light by accommodating a printed personal identification information in a reader.

Japanese Patent No. 4910422

  In the technique described in Patent Document 1, since it is necessary to accommodate the printed personal identification information in the reader, the determination work is complicated and cannot be performed at high speed. In addition, when a transport mechanism for automatically transporting and housing is provided, the reading device becomes large and expensive, and the determination work also takes time.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a technology that is a secret information printed matter using infrared rays and that can be accurately determined by simply holding it over a reading window of a reader.

That is, according to the first aspect of the present invention, a security information forming area and a disturbance light detection area are provided on the surface of the infrared reflective base material, and a printed image showing the security information is provided in the information forming area and the printing is performed. A secret information printed matter provided with a concealing layer that covers an image, and a disturbance light detection layer provided in the disturbance light detection region,
When two types of infrared rays having different wavelengths are used as the first infrared ray and the second infrared ray, respectively,
The printed image is composed of black ink that absorbs the first infrared ray,
The masking layer is composed of black ink that transmits the first infrared ray and absorbs or reflects the second infrared ray;
The disturbance light detection layer is made of black ink that transmits the first infrared ray and absorbs the second infrared ray,
This is a personal identification information printed matter.

  The invention according to claim 2 is the personal identification information printed matter according to claim 1 or 2, wherein the first infrared ray is a far infrared ray, and the second infrared ray is a near infrared ray.

The invention described in claim 3 uses a reading device that separately irradiates the personal information printed matter described in claim 1 or 2 with the first infrared ray and the second infrared ray, respectively, and detects the reflected light. In the determination method for determining whether or not the personal identification information printed matter is authentic,
A positioning step for confirming that the ambient light detection layer can be detected at a sufficient concentration in a state where the second infrared ray is irradiated on the secret information printed matter;
A determination step of irradiating the personal identification information printed matter with the first infrared ray and the second infrared ray separately, and determining that it is not authentic when either or both of the following conditions 1 and 2 are not satisfied: It is a method for determining a printed personal identification information, characterized by comprising

Condition 1. The PIN information can be detected by irradiating the PIN information forming area of the PIN code printed matter. Condition 2 The PIN information cannot be detected by irradiating the PIN code forming area of the PIN code printed matter with the second infrared ray. about.

The invention described in claim 4 uses a reading device that separately irradiates the personal information printed matter described in claim 1 or 2 with the first infrared ray and the second infrared ray, respectively, and detects the reflected light. In the determination method for determining whether or not the personal identification information printed matter is authentic,
A positioning step for confirming that the ambient light detection layer can be detected at a sufficient concentration in a state where the second infrared ray is irradiated on the secret information printed matter;
A determination step for determining that the printed personal identification information printed matter is not authentic when the first infrared ray and the second infrared ray are separately irradiated and any one of the following conditions 1 to 3 is not satisfied. And a method of determining a printed personal identification information, characterized by comprising:

Condition 1. The PIN information can be detected by irradiating the PIN information forming area of the PIN code printed matter. Condition 2 The PIN information cannot be detected by irradiating the PIN code forming area of the PIN code printed matter with the second infrared ray. Condition 3: The disturbance light detection layer cannot be detected at a sufficient concentration when the first infrared ray is irradiated to the disturbance light detection area of the security information printed matter.

  The personal identification information printed matter of the present invention has a disturbance light detection area alongside the personal identification information formation area, and transmits a first infrared ray to the disturbance light detection area and absorbs a second infrared radiation. If the amount of infrared light contained in natural light or room light (hereinafter referred to as “disturbance light”) is large even if it is held over the reading window of the reader, the first infrared light contained in this disturbing light is disturbing light. It passes through the detection layer and is reflected by the substrate. Moreover, since the surrounding base material also reflects infrared rays, a disturbance light detection layer having a sufficient concentration cannot be detected. On the other hand, when the amount of ambient light is small, the amount of infrared light transmitted through the ambient light detection layer is small, and visible light contained in the ambient light is absorbed by the black ambient light detection layer and reflected by the surrounding substrate. Therefore, the contrast between the two becomes high, and the ambient light detection layer can be detected and read at a sufficient concentration.

  Therefore, when the ambient light detection layer having a sufficient density cannot be detected by holding the printed personal identification information of the present invention over the reading window of the reader, it is not possible to read the personal identification information and determine the authenticity. It can be judged that it is appropriate. In this case, it is only necessary to bring the security information printed matter closer to the reading window and block ambient light. Then, it is possible to detect a disturbance light detection layer having a sufficient concentration, and therefore, after confirming that the amount of disturbance light is small, the PIN information is detected by irradiating the first infrared ray and the second infrared ray at that position. By checking whether or not it is possible, it can be determined whether or not the printed personal identification information is authentic.

  As described above, according to the present invention, since it is possible to determine the amount of disturbance light before confirming whether or not the password information can be detected, it is possible to determine with high accuracy simply by holding it over the reading window.

FIG. 1A is a plan view for explaining the main part of an example of the printed personal identification information according to the present invention, and FIG. 1B is a sectional view for explaining the main part. This is a spectral reflectance curve obtained by irradiating a printing ink film printed on white paper with light and measuring its reflectance. It is explanatory drawing which shows the method of determining the authenticity of PIN information printed matter 1 using a reader.

  The printed personal identification information according to the present invention includes an infrared reflecting base material, and a personal information forming area and an ambient light detection area provided on the infrared reflective base material as essential components. In the password information forming area, it is necessary to provide a print image indicating the password information and a concealing layer that covers the print image. Moreover, it is necessary to provide a disturbance light detection layer in the disturbance light detection region.

  When two types of infrared rays having different wavelengths are used as the first infrared ray and the second infrared ray, respectively, the printed image, the concealing layer, and the disturbance light detection layer satisfy the following conditions.

  That is, the printed image is composed of black ink that absorbs the first infrared ray.

  The concealing layer is composed of black ink that transmits the first infrared ray and absorbs or reflects the second infrared ray.

  The disturbance light detection layer is made of black ink that transmits the first infrared ray and absorbs the second infrared ray.

FIG. 1 (a) is a plan view for explaining the main part of an example of the printed personal identification information according to the present invention, and FIG. 1 (b) is a sectional view for explaining the main part. PIN information printed matter 1 concerning
Uses white coated paper as the infrared reflective base material 10 and has a secret information forming area 2a and a detection disturbance light detection area 3a on its surface. In the figure, the range surrounded by the one-dot chain line is the password information formation region 2a, and the range surrounded by the two-dot chain line is the detection disturbance light detection region 3a, which are provided side by side without overlapping each other.

  In the password information forming area 2a, a print image 21 indicating the password information is provided, and a concealing layer 22 is provided to cover the print image 21. On the other hand, a disturbance light detection layer 31 is provided in the detection disturbance light detection region 3a.

  First, the personal identification information forming area 2a will be described. In this example, far infrared rays are used as the first infrared rays, and near infrared rays are used as the second infrared rays, and the printed image 21 is black ink that absorbs near infrared rays and far infrared rays. It is configured. The masking layer 22 is made of black ink that transmits far infrared rays and absorbs near infrared rays. For this reason, first, when the password information formation region is observed under natural light, the password information cannot be observed because the masking layer 22 is made of black ink. Next, when the far infrared ray is irradiated and the reflected light is received by the infrared imaging camera, the far infrared ray passes through the concealing layer 22 and is absorbed by the print image 21, while the far infrared ray incident on the periphery of the print image 21 is Since it is reflected by the infrared reflective substrate 10 and again passes through the concealing layer 22 and is received by the infrared imaging camera, the password information formed by the printed image 21 can be detected by the contrast. Further, when the near infrared ray is irradiated, the near infrared ray is absorbed by the concealing layer 22 and does not reach the print image 21, so that the password information cannot be detected.

  Next, in this example, the ambient light detection layer 31 is made of the same black ink as that of the masking layer 22. That is, the disturbance light detection layer 31 is made of black ink that transmits far infrared rays and absorbs near infrared rays. For this reason, when the far infrared ray is irradiated and the reflected light is received by the infrared imaging camera, the far infrared ray passes through the disturbance light detection layer 31 and is reflected by the infrared reflective base material 10, and the far infrared ray incident on the periphery is also Since it is reflected by the infrared reflective substrate 10, there is no contrast between them, and therefore the ambient light detection layer cannot be detected. Further, when the near infrared ray is irradiated, the near infrared ray is absorbed by the disturbance light detection layer 31, while the near infrared ray incident around the disturbance light detection layer 31 is reflected by the infrared reflective base material 10, so that the contrast is increased. The disturbance light detection layer 31 can be detected.

  When the disturbance light detection layer 31 is observed under natural light, the result varies depending on the amount of infrared rays included in the natural light. That is, when the infrared light is hardly contained, the disturbance light detection layer 31 is made of black ink, and can be observed as a high-density image. The same applies to the case of imaging with an infrared imaging camera. On the other hand, when a large amount of infrared light is contained, the disturbance light detection layer 31 cannot be detected or can only be detected as a low-density image when captured by an infrared imaging camera.

  Here, as the black ink that absorbs near-infrared rays and far-infrared rays, black ink for general printing containing carbon black can be used. Examples of black ink that transmits near infrared rays and absorbs far infrared rays include inks containing perylene black pigments. FIG. 2 is a spectral reflectance curve obtained by irradiating a printing ink film printed on white paper with a light beam and measuring the reflectance. In this reflected light, in addition to the reflected light component by the printing ink film, The component which permeate | transmitted the printing ink film and was reflected by the white paper is contained. In the figure, A shows the spectral reflectance curve of FD Carton ACE black ink manufactured by Toyo Ink Manufacturing Co., Ltd. for general printing, and B shows the spectral reflectance curve of ink containing a perylene-based black pigment.

This secret information printed matter 1 can be used, for example, by applying an adhesive to the infrared reflective substrate 10 and affixing it to various articles with this adhesive. For example, securities such as banknotes and bonds. Further, it is an ID card, an ID card, an employee ID card, a membership card or other ID card. It can also be affixed to branded or expensive products. And it is possible to estimate whether these articles | goods are authentic by determining whether the PIN information printed matter 1 stuck on these articles | goods is authentic.

  This determination can be mechanically performed using a reader having a built-in infrared irradiation device and an infrared imaging camera and having a transparent window. For the determination, it is only possible to hold the personal identification information printed matter 1 over the transparent window of the reader, and it is not necessary to house or insert it in the reader.

  FIG. 3 is an explanatory diagram showing a method for determining the authenticity of the PIN code printed matter 1 using such a reader. That is, the reader 4 has a transparent window 41, a far-infrared irradiation device 42 that irradiates far-infrared x 2 on the personal identification information printed matter 1 held over the transparent window 41, and a near-infrared x 3 that irradiates near-infrared x 3. An infrared irradiation device 43 is incorporated. Moreover, the infrared information camera 44 which receives these infrared rays irradiated to the PIN information printed matter 1 and detects the PIN information and the disturbance light detection layer is incorporated.

  In determining whether the personal identification information printed matter 1 is true or false, the personal identification information printed matter 1 is held over the transparent window 41, and first, the presence or absence of disturbance light is detected. When there is a large amount of disturbance light, the security information printed matter 1 is further moved closer to the transparent window 41 and positioned in a state where the disturbance light is sufficiently reduced. Then, it is checked whether or not the personal identification information can be read in the positioned state in this way, and the true / false is determined. The positioning step and the determination step are a series of steps, and both steps can be executed almost simultaneously and instantaneously.

  This positioning step is repeated until the ambient light detection layer 31 is read by irradiating the personal identification information printed matter 1 held over the transparent window 41 by irradiating near-infrared rays, and the disturbance light detection layer 31 can be read at a sufficient concentration. It is a process of moving. That is, if it is confirmed that the ambient light detection layer 31 can be read at a sufficient concentration, the next determination step is executed at this position. When the disturbance light detection layer 31 cannot be read, the security information printed matter 1 is moved closer to the transparent window 41 and moved to a position where the disturbance light detection layer 31 can be read with a sufficient density. Note that it is possible to determine whether or not the ambient light detection layer 31 can be read with a sufficient concentration by comparing a predetermined reference concentration with a detected concentration.

  Next, the determination step irradiates the positioned personal identification information print 1 with the far infrared ray x2 and the near infrared ray x3 separately and in any order, and the authenticity of the personal identification information print 1 is determined by the reflected light. It is a step of determining.

  As a criterion for this determination, for example, the following condition 1 and condition 2 can be adopted. According to this criterion, when the personal identification information printed matter 1 satisfies both conditions 1 and 2, it is estimated that the personal identification information printed matter 1 is authentic, and either one or both of the conditions 1 and 2 is satisfied. If not, it is determined that it is not authentic.

Condition 1. The password information can be detected by irradiating the far infrared ray x2 to the password information forming area 2a of the password information printed matter 1. Condition 2. The password information forming area 2a of the password information printed matter 1 is irradiated with the near infrared ray x3. Cannot be detected.

As described above, when the personal identification information printed matter 1 is authentic, the far infrared ray x2 irradiated to the personal identification information formation region 2a passes through the concealing layer 22 and is absorbed by the printed image 21, and is reflected around it. Therefore, the password information that the print image 21 configures can be detected. Further, since the near infrared ray x3 irradiated to the personal identification information forming area 2a is absorbed by the concealing layer 22 and does not reach the print image 21, the personal identification information formed by the print image 21 cannot be detected. That is, the genuine password information printed matter 1 always satisfies both the condition 1 and the condition 2.

  Even if the password information printed matter 1 satisfies both the conditions 1 and 2, it cannot be guaranteed that the password information printed matter 1 is authentic. For example, when another forgery prevention technology is applied to the personal identification information printed matter 1, the authenticity should be determined in consideration of the forgery prevention technology.

  In addition to the conditions 1 and 2, the following condition 3 can also be adopted as the determination criterion. According to this criterion, when all of the conditions 1 to 3 are satisfied, the password information printed matter 1 is estimated to be authentic, and when any of the conditions 1 to 3 is not satisfied, it is determined not to be authentic. .

  Condition 3 When the ambient light detection area 3a of the personal identification information printed matter 1 is irradiated with far infrared rays, the ambient light detection layer 31 cannot be detected with a sufficient density.

  As described above, when the personal identification information printed matter 1 is authentic, the ambient light detection layer 31 transmits far-infrared rays, and is reflected by the light reflective substrate 10 at any position around the ambient light detection layer 31 and its surroundings. Therefore, the disturbance light detection layer 31 cannot be detected with a sufficient concentration. That is, the genuine password information printed matter 1 always satisfies the condition 3 in addition to the conditions 1-2. This reference density may be different from the reference density in the positioning step.

  In addition to the conditions 1 to 3, the following condition 4 can be used as a criterion. However, since the black ink for general printing satisfies the condition 4, depending on the condition 4, the ambient light detection layer 31 may be used. It is difficult to see counterfeit products formed with black ink for general printing.

  Condition 4: The disturbance light detection layer 31 can be detected when the ambient light detection area 3a of the personal identification information printed matter 1 is irradiated with near infrared rays.

  The present invention has been described above by taking, as an example, the secret information printed matter in which the masking layer 22 is made of black ink that absorbs near infrared rays. However, the masking layer 22 can be made of black ink that reflects near infrared rays. In the above example, the far infrared ray is used as the first infrared ray, and the near infrared ray is used as the second infrared ray. However, the present invention is not limited to this, and another infrared ray is used as the first infrared ray or the second infrared ray. It is also possible. For example, it is a case where near infrared rays are used as the first infrared rays and far infrared rays are used as the second infrared rays.

DESCRIPTION OF SYMBOLS 1 ... PIN information printed matter 10 ... Light reflective base material 2a ... PIN information formation area 21 ... Print image which shows PIN information
22 ... Hiding layer 3a ... disturbance light detection region
31. Disturbance light detection layer 4 reader 41 transparent window 42 far infrared irradiation device 43 near infrared irradiation device 44 infrared imaging camera

Claims (4)

Provide a password information formation area and a disturbance light detection area alongside the secret information formation area on the surface of the infrared reflective substrate, provide a print image indicating the password information in the information formation area, and provide a concealing layer covering the print image. It is a secret information printed matter configured by providing a disturbance light detection layer in the light detection region,
When two types of infrared rays having different wavelengths are used as the first infrared ray and the second infrared ray, respectively,
The printed image is composed of black ink that absorbs the first infrared ray,
The masking layer is composed of black ink that transmits the first infrared ray and absorbs or reflects the second infrared ray;
The disturbance light detection layer is made of black ink that transmits the first infrared ray and absorbs the second infrared ray,
A secret information printed matter characterized by that.   The personal identification information printed matter according to claim 1 or 2, wherein the first infrared ray is a far infrared ray, and the second infrared ray is a near infrared ray. Whether the personal identification information printed matter is authentic by using a reading device that separately irradiates the personal identification information printed matter according to claim 1 or 2 with the first infrared ray and the second infrared ray and detects the reflected light. In the determination method for determining whether or not,
A positioning step for confirming that the ambient light detection layer can be detected at a sufficient concentration in a state where the second infrared ray is irradiated on the secret information printed matter;
A determination step of irradiating the personal identification information printed matter with the first infrared ray and the second infrared ray separately, and determining that it is not authentic when either or both of the following conditions 1 and 2 are not satisfied: A method for judging a printed product of personal identification information, characterized by comprising:
Condition 1 The personal identification information can be detected by irradiating the personal information forming area of the personal identification information printed matter with the first infrared ray.
Condition 2: The personal information is not detected by irradiating the personal information forming area of the personal information with a second infrared ray. Whether the personal identification information printed matter is authentic by using a reading device that separately irradiates the personal identification information printed matter according to claim 1 or 2 with the first infrared ray and the second infrared ray and detects the reflected light. In the determination method for determining whether or not,
A positioning step for confirming that the ambient light detection layer can be detected at a sufficient concentration in a state where the second infrared ray is irradiated on the secret information printed matter;
A determination step for determining that the printed personal identification information printed matter is not authentic when the first infrared ray and the second infrared ray are separately irradiated and any one of the following conditions 1 to 3 is not satisfied. And a method for determining a printed personal identification information, characterized by comprising:
Condition 1 The personal identification information can be detected by irradiating the personal information forming area of the personal identification information printed matter with the first infrared ray.
Condition 2: The personal information is not detected by irradiating the personal information forming area of the personal information with a second infrared ray.
Condition 3: The disturbance light detection layer cannot be detected with sufficient density when the first infrared ray is irradiated to the disturbance light detection area of the personal identification information printed matter.

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