KR20130051355A - Security module reading apparatus using phosphorescence and fluorescence, and method for reading security module - Google Patents

Abstract

PURPOSE: A security medium reading device using phosphor materials and fluorescent materials and a method thereof are provided to accurately determine whether a security medium is forged or not by accurately discerning the security medium through a way of sensing a phosphor included in the security element of the security medium by time using two light receiving sensors. CONSTITUTION: A security medium reading device(10a) includes a light source(12), a first light receiving part(14), a second light receiving part(16), and a reading part(18a). A security medium(2) includes a security element containing a phosphor(20) in order to prevent forgery or modulation of a product. The phosphor is a form of a metal compound or a metal oxide having a different fluorescent material and a different wavelength. The light source irradiates UV light to the security element located on the upper or lower surface of the security medium. The first light receiving part receives reflection light or transmission light from the security element of the security medium. The second light receiving part is arranged by being separated from the first light receiving part and receives reflection light and transmission light from the security element if a preset time comes after receiving reflection light or transmission light through the first light receiving part. The reading part determines whether the security medium is forged or not by sensing the color change of sensed reflection light and transmission light through the first light receiving part and the second light receiving part by time. [Reference numerals] (18a) Reading part

Description

Security media reading apparatus using phosphorescence and fluorescence, and method for reading security module

One aspect of the present invention relates to a security medium and a security medium reading technique requiring security.

As devices such as scanners, printers, and computers with high precision are widely used, securities such as banknotes and checks are falsified and abused, and a method or apparatus for reliably identifying the counterfeits is required. . In the case of forgery by copying recently, research on identification method and identification device that can easily identify fakes is being conducted, and various papermaking methods and printing techniques for the purpose of preventing forgery have been developed. Banknotes and the like which are difficult to forge.

Prior art Japanese Patent Application Laid-Open No. Hei 06-171071 discloses a plurality of light receiving elements having the same wavelengths arranged at different angles, the light irradiated on the bills is received by a plurality of light receiving elements, and the bending of bills is determined by comparing them. A method of identifying concave printed matter and other printed matter has been proposed.

Japanese Patent Application Laid-Open No. 09-062894 discloses one set of red and green light on a color ink with respect to a printed matter using color ink whose color changes depending on the viewing angle, and uses two light receiving sensors having different light receiving angles. Background Art [0002] A printed matter reading method and apparatus have been proposed for measuring and discriminating color ink from differences in color and reflection angles.

Japanese Patent Laid-Open No. 06-203244 proposes an authenticity identifying device such as a banknote that receives both light of reflection and transmission with respect to light of a single light emitting element to discriminate a watermark.

According to an aspect, a security medium reading device and method for identifying a security medium or accurately determining whether a security medium is forged are provided.

According to an aspect, an apparatus for reading a security medium including a security element containing a phosphor includes: a light source for irradiating UV light to the security element, a first light receiving unit for receiving reflected light or transmitted light from the security element, and a first light receiving unit A second light receiving unit arranged to be spaced apart from the second light receiving unit to receive reflected light or transmitted light from the security element after a preset time elapses after the light receiving through the first light receiving unit; and It includes a reading unit for detecting a change in color to detect the forgery of the security medium.

According to another aspect, a method of reading a security medium including a security element containing a phosphor by a security medium reading device includes irradiating UV light to the security element, and primarily detecting a color of reflected or transmitted light from the security element. Detecting a color of reflected light or transmitted light from a security element after a predetermined time elapses after the first detection; and using a first detected color and a second detected color as time passes. Determining whether the medium is forged or not.

According to yet another aspect, an apparatus for reading a security medium including a security element containing a combination of phosphor and fluorescent material includes a light source for irradiating UV light to the security element, a light receiving unit for receiving reflected or transmitted light from the security element; And a _{first condition in which the} light-receiving unit detects a combination color of the color emitted by the phosphor and the color emitted by the phosphor at T ₁ (T ₁ <t ₁ ) time, and T ₂ (t ₁ <T ₂ <t ₂ ). And a reading unit for checking whether the phosphor meets all of the second conditions for detecting only the color of light emitted and determining whether the security medium has been tampered with.

According to another aspect of the present invention, a method for reading a security medium including a security element containing a combination of a fluorescent material and a phosphor by the security medium reading device includes irradiating UV light to the security element, and reflected or transmitted light from the security element. Receiving a light, and confirming that the light-receiving unit satisfies the first condition of detecting a combination color of the color emitted by the phosphor and the color emitted by the phosphor at T ₁ (T ₁ <t ₁ ) time; Verifying that the phosphor meets the second condition of detecting only the emitting color at ₂ (t ₁ <T ₂ <t ₂ ) time; and if both the first and second conditions are met, the security medium is genuine. And determining otherwise as forging.

According to an embodiment of the present disclosure, the security medium may be accurately identified or the security medium may be forged by using two light receiving sensors to detect phosphors included in the security element of the security medium over time. . Further, it is possible to prevent the forgery of the security medium to prevent the problem that the security medium is forged and exploited.

According to another embodiment, the security medium by detecting the security element containing the combination of the phosphor and the fluorescent material using time information by using the characteristics of the phosphor and the fluorescent material having different light emission properties with time Can be accurately identified or a security medium can be forged. Further, it is possible to prevent the forgery of the security medium to prevent the problem that the security medium is forged and exploited.

1 is a block diagram of a security medium reading apparatus according to an embodiment of the present invention,
2 is a block diagram of a security medium reading apparatus according to another embodiment of the present invention;
3 is a flowchart illustrating a method for reading a security medium of the apparatus for reading a security medium according to an embodiment of the present invention;
4 is a flowchart illustrating a security medium reading method of the security medium reading apparatus according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention; In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, and this may vary depending on the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

1 is a block diagram of a security medium reading apparatus 10a according to an embodiment of the present invention.

Referring to FIG. 1, the security medium reading apparatus 10a includes a light source 12, a first light receiving unit 14, a second light receiving unit 16, and a reading unit 18a.

The security medium 2 includes all media to which security elements can be applied, such as print media such as bank notes, cards, securities, gift certificates, passport papers, ID cards, copy papers, and art papers. Furthermore, the security medium 2 may include decorative articles, clothing, hazard indicators, toys, fashion products, stickers, plastic products and special products requiring security.

According to one embodiment, the security medium 2 comprises a security element containing the phosphor 20 to prevent forgery and tampering of the product. Basically, the phenomenon of emitting the energy absorbed by the material as light is called luminescence, which is classified into phosphorescence and fluorescence. Phosphorescence and fluorescence are generally classified by the difference in the time of emission by external stimulation. In the case of fluorescence, the emission time after stopping the emission in emission is less than a predetermined time, for example, 10 ⁻⁴ (sec) or less. Phosphorescence refers to having a longer light emission time.

Phosphorescence and fluorescence are materials that emit light toward longer wavelengths by being excited by absorbed light, and may be classified into inorganic fluorescence and daylight fluorescence. Inorganic fluorescence has the property of phosphorescence in which the excited state remains even after being stimulated by light, and pigments having this property are used for luminous paints, and phosphorescent pigments are self-luminous pigments having self-luminous properties by half-radiation of radioactive elements. The phosphorescent pigment in the present invention encompasses the concepts of spontaneous light and a photoluminescent pigment.

According to an embodiment, the phosphor 20 is in the form of a metal compound or a metal oxide having a different light emission wavelength from the phosphor. Like the fluorescent material, it is effective to have invisible colorless or pale color and white color as in the case of the fluorescent material, and it is preferable that afterglow may be maintained in the dark even after the external stimulus is removed.

According to one embodiment, the phosphor 20 may be a sulfide-based, and when looking at the phosphor and the light emission characteristics, CaS: Bi is a violet light emission, CaSrS: Bi is a blue light emission, ZnS: Cu is a green light emission, ZnSCdS: Cu represents yellow light emission. Or the phosphor 20 is chemically stable, and light resistance is excellent and ₄ is a strong MAl ₂ O afterglow time is long light emission luminance meter (where, M is Ca, Sr, Ba and ^{_{Mg), YAlO 3: Ce 3}} + ( green Light emitting).

The light source 12 irradiates UV light to a security element located on an upper surface (surface) or a lower surface (lower surface) of the security medium 2. In this case, the light emission amount of the light source 12 may be adjusted. The first light receiving unit 14 and the second light receiving unit 16 have a light receiving output value corresponding to the light receiving amount of transmitted light through which the irradiation light of the light source 12 passes through the security medium 2 or the reflected light reflected from the security medium 2. (Light reception data) is detected.

The first light receiver 14 receives the reflected light or the transmitted light from the security element of the security medium 2. The second light receiver 16 is spaced apart from the first light receiver 14 to receive the reflected light or the transmitted light from the security element when a predetermined time arrives after receiving the reflected light or the transmitted light through the first light receiver 14. According to an embodiment, it is also possible to arrange a prism or a lens that polarizes the irradiation angle in the light emitting element of the light source 12 or the light receiving element of the first light receiving portion 14 and the second light receiving portion 16. Although FIG. 1 illustrates an example in which the first light receiving unit 14 and the second light receiving unit 16 receive the reflected light, it is obvious that an embodiment for receiving the transmitted light may be possible.

Although not shown in FIG. 1, each light receiving element included in the first light receiving unit 14 and the second light receiving unit 16 outputs an electric signal corresponding to the amount of light received by the received reflected light or transmitted light, and is output from each light receiving element. The signal is amplified by each amplifier corresponding to each light receiving element, and is converted into a digital signal by each A / D converter corresponding to each amplifier and used to determine whether the security medium 2 of the reading unit 18a is forged.

According to one embodiment, when the security medium 2 is inserted into the security medium insertion hole of the security medium reading device 10a in a predetermined insertion direction (this surface), the insertion detection sensor detects that the security medium 2 is inserted. do. Then, the conveying motor of the security medium conveying mechanism is operated to convey the security medium 2, and each sensor such as the first light receiving unit 14 and the second light receiving unit 16 is operated. At this time, the second light receiving unit 16 receives the reflected light or transmitted light from the phosphor 20 of the security element when a preset time elapses according to the conveying speed of the security medium 2.

The reading unit 18a detects a color change of reflected light or transmitted light detected by the first light receiving unit 14 and the second light receiving unit 16 as time passes, and determines whether the security medium 2 is forged.

According to an exemplary embodiment, when the reading unit 18a detects all of a predetermined emission color (for example, green) emitted by the phosphor 20 in the security element through the first light receiving unit 14 and the second light receiving unit 16. The security medium 2 is determined as genuine. On the contrary, if the predetermined light emission color emitted by the phosphor 20 in the security element is not detected through at least one of the first light receiving unit 14 and the second light receiving unit 16, the security medium 2 is determined as forged. do.

According to an exemplary embodiment, when the reading unit 18a detects all of a predetermined emission color emitted by the phosphor in the security element through the first light receiving unit 14 and the second light receiving unit 16, the reading medium 18a phosphores the security medium 2. Judging from the substance contained. In contrast, the reader 18a detects a predetermined emission color (for example, green) emitted by the phosphor in the security element through the first light receiver 14, but the phosphor in the security element through the second light receiver 16. If the predetermined emission color (for example, green) that emits light is not detected, it is determined that the security medium 2 contains fluorescent material. At this time, the reading unit 18a determines that the security medium 2 is forged.

2 is a block diagram of a security medium reading apparatus 10b according to another embodiment of the present invention.

Referring to FIG. 2, the security medium reading apparatus 10b includes a light source 12, a light receiving unit 13, a reading unit 18b, and a memory 19.

According to one embodiment, the security medium 2 comprises a security element containing a combination of phosphor 20 and phosphor 22 to prevent forgery and tampering of the product. That is, a fluorescent phosphorescent infrared ink, a resin, or a composition made by combining the fluorescent material 22 and the phosphor 20 is contained in the security element.

Since the description of the phosphor 20 is as described above with reference to FIG. 1, a detailed description thereof will be omitted. The fluorescent material 22 is quite diverse in its kind, mainly organic fluorescent dyes or pigments are used, the pigment pigment type is usually used in the Lumogen color (Lumogen Color), the synthetic resin solid solution type is di and triphenylmethane-based, Disperse dyes such as chianthene, thiazole and thiazine in synthetic resins such as melamine resin, urea resin and sulfonamide resin are used. Most of these fluorescent pigments are fine granulated by dispersing the fluorescent dye in a specific resin, because in order for the fluorescent dye to emit efficient fluorescence, it must be dispersed in such a thin state that individual molecules do not influence each other. In order to use the method of insolubilizing by mixing in the resin, the fluorescence intensity is increased and the light resistance is improved.

Fluorescent pigments currently on the market are generally manufactured by dispersing thermoplastic resins such as acrylic resins, polyester resins, polyamide resins or the like, or by mixing them with thermosetting resins. Alternatively, Sr (PO ₂ ) Cl: Eu (blue luminescence), Zn ₂ GeO ₂ : Mn (green luminescence), Y ₂ O ₂ S: Eu (red luminescence) metal Compound.

The light source 12 irradiates UV light to a security element located on an upper surface (surface) or a lower surface (lower surface) of the security medium 2. In this case, the light emission amount of the light source 12 may be adjusted. The light receiving unit 13 detects a light receiving output value (light receiving data) corresponding to the light receiving amount of transmitted light through which the light from the light source 12 passes through the security medium 2 or the light receiving amount of reflected light reflected from the security medium 2. According to one embodiment, it is also possible to arrange a prism or a lens for polarizing the irradiation angle in the light emitting element of the light source 12 or the light receiving element of the light receiving portion 13. In FIG. 2, an example in which the light receiving unit 13 receives the reflected light is illustrated.

Although not shown in FIG. 2, each light receiving element included in the light receiving unit 13 outputs an electric signal corresponding to the amount of light received by the received light or transmitted light, and the electric signal output from each light receiving element corresponds to each light receiving element. It is amplified by the amplifier, and is converted into a digital signal in each A / D converter corresponding to each amplifier, and used for discriminating whether or not the security medium 2 of the reading unit 18b is forged.

According to one embodiment, when the security medium 2 is inserted into the security medium insertion hole of the security medium reading device 10b in a predetermined insertion direction (this surface), the insertion detection sensor detects that the security medium 2 is inserted. do. Then, the conveying motor of the security medium conveyance mechanism is operated to convey the security medium 2, and each sensor of the light receiving unit 13 is operated. At this time, the light receiving unit 13 receives the reflected light or transmitted light from the phosphor 20 and the fluorescent material 22 of the security element according to the conveying speed of the security medium (2).

The reading unit 18b has a first condition in which the light receiving unit 13 detects a combination color of a color emitted by the fluorescent material 22 and a color emitted by the phosphor 20 at a time T ₁ (T ₁ <t ₁ ). And whether the security medium 2 is forged or not according to the result of the check by checking whether all of the second conditions for detecting only the color of the phosphor emitted at T ₂ (t ₁ <T ₂ <t ₂ ) time are satisfied. do. The memory 19 stores the color information of light emitted from the fluorescent material 22 and the phosphor 20 according to the first and second conditions set in advance, and determines the security medium 2 of the reading unit 18b. Use for comparison contrast.

Determination of the security medium 2 of the reading unit 18b For example, the fluorescent material 22 contained in the security element of the security medium 2 is a material that emits a first color (for example, red), and the phosphor material ( Assume that 20) is a material emitting a second color (for example, yellow). At this time, the reading unit 18b receives the combination color of the first color (for example, red) and the second color (for example, yellow) through the light receiving unit 13 at the time T ₁ (T ₁ <t ₁ ), which is the first condition. Check if it is detected. In addition, the reading unit 18b checks whether the light receiving unit 13 detects a second color (for example, yellow) that the phosphor emits light at a time T ₂ (t ₁ <T ₂ <t ₂ ), which is the second condition. . If both conditions are satisfied as a result of the check, the reading unit 18b finally determines that the security medium 2 is not forged. In other cases, it is determined as forged.

3 is a flowchart illustrating a security medium reading method of the security medium reading apparatus 10a according to an embodiment of the present invention.

1 and 3, the light source 12 of the security medium reading apparatus 10a irradiates UV light to a security element containing the phosphor 20 of the security medium 2 (300). Subsequently, the color of the reflected light or the transmitted light from the security element is first detected through the first light receiver 14 (310). In operation 320, a color of reflected light or transmitted light is second detected from the security element after a predetermined time through the second light receiving unit 16. In this case, the preset time may be determined according to the conveying speed of the security medium (2).

Subsequently, the security medium reading apparatus 10a determines whether the security medium 2 is forged through the reading unit 18a using the primary sensed color and the secondary sensed color (330). According to an embodiment, the reading unit 18a detects all of the predetermined emission colors emitted by the phosphor 20 in the security element through the first light receiving unit 14 and the second light receiving unit 16. Judge it as genuine. In contrast, when the predetermined light emission color emitted by the phosphor 20 in the security element is not detected through at least one of the first light receiving unit 14 and the second light receiving unit 16, it is determined that the security medium 2 is forged. do.

According to an exemplary embodiment, when the reading unit 18a detects all of a predetermined emission color emitted by the phosphor in the security element through the first light receiving unit 14 and the second light receiving unit 16, the reading medium 18a phosphores the security medium 2. Judging from the substance contained. In contrast, the reader 18a detects a predetermined color of light emitted by the phosphor in the security element through the first light receiver 14, but a predetermined amount of light emitted by the phosphor in the security element is emitted through the second light receiver 16. If the emission color is not detected, it is determined that the security medium 2 contains fluorescent material.

4 is a flowchart illustrating a security medium reading method of the security medium reading apparatus 10b according to another embodiment of the present invention.

2 and 4, the light source 12 of the security medium reading apparatus 10b irradiates 400 with UV light on the security element. The light receiving unit 13 receives the reflected light or the transmitted light from the security element (410). Subsequently, the security medium reading device 10b uses the reading unit 18b so that the light receiving unit 13 receives the color and the phosphor 20 in which the fluorescent material 22 emits light at a time T ₁ (T ₁ <t ₁ ). It is checked whether the first condition for detecting the combined color of the emitted color is satisfied (420). And, T ₂ should ensure that _{(t 1 <T 2 <t} 2) satisfies the second condition for detecting only the color of the light-emitting phosphors (20) in time (430). If the reading unit 18b satisfies both the first condition and the second condition (440), the reading medium 18 determines the authenticity of the security medium 2 as genuine, and in other cases, the reading medium 18b.

The embodiments of the present invention have been described above. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

2: Security medium 10a, 10b: Security medium reading device
12 light source 13 light receiving unit
14: first light receiving unit 16: second light receiving unit
18a, 18b: reading unit 19: memory
20: phosphor 22: fluorescent material

Claims (7)

An apparatus for reading a security medium comprising a security element containing phosphor,
A light source for irradiating UV light to the security element;
A first light receiver configured to receive reflected light or transmitted light from the security element;
A second light receiver disposed spaced apart from the first light receiver to receive reflected light or transmitted light from the security element after a predetermined time elapses after light reception through the first light receiver; And
A reading unit that detects a change in color of reflected light or transmitted light detected through the first light receiving unit and the second light receiving unit as time passes, and determines whether the security medium is forged or not;
Security medium reading apparatus comprising a. The method of claim 1, wherein the reading unit,
And detecting the security medium as authentic when both the predetermined light emission color emitted by the phosphor in the security element is detected through the first light receiving unit and the second light receiving unit. The method of claim 2, wherein the reading unit,
When both the predetermined light emitting color emitted by the phosphor in the security element is detected through the first light receiving unit and the second light receiving unit, it is determined that the phosphor contains a phosphor.
When the predetermined light emitting color emitted by the phosphor in the security element is detected through the first light receiving unit, if the predetermined light emitting color emitted by the phosphor in the security element is not detected through the second light receiving unit, the security medium is fluorescent. A security medium reading device, characterized in that it is determined to contain a substance. The method of claim 1,
The security medium is inserted into the insertion hole of the security medium reading device is conveyed by the security medium transport mechanism,
And the second light receiving unit receives reflected light or transmitted light from the security element when the preset time elapses according to the conveying speed of the security medium after receiving the light through the first light receiving unit. A method of reading a security medium comprising a security element containing a phosphor, wherein the security medium reading device comprises:
Irradiating UV light to the security element;
Firstly detecting a color of reflected or transmitted light from the security element;
Secondly detecting a color of reflected light or transmitted light from the security element when a predetermined time elapses after the first detection; And
Determining whether the security medium is forged or altered over time using the primary sensed color and the secondary sensed color;
Security medium reading method comprising a. An apparatus for reading a security medium comprising a security element containing a combination of phosphor and phosphor,
A light source for irradiating UV light to the security element;
A light receiving unit for receiving reflected light or transmitted light from the security element; And
A first condition in which the light receiving unit detects a combination color of a color emitted from the fluorescent material and a color emitted from the phosphor at T ₁ (T ₁ <t ₁ ) time; and T ₂ (t ₁ <T ₂ <t ₂ ) a reading unit for checking whether the phosphor meets all of the second conditions of detecting only the color of light emitted and determining whether the security medium is forged or not according to a result of the checking;
Security medium reading apparatus comprising a. A method of reading a security medium including a security element containing a combination of a fluorescent material and a phosphor, wherein the security medium reading device comprises:
Irradiating UV light to the security element;
Receiving reflected light or transmitted light from the security element;
Confirming whether the light receiving unit satisfies a first condition of detecting a combination color of a color emitted from the fluorescent material and a color emitted from the phosphor at T ₁ (T ₁ <t ₁ ) time;
Checking whether the phosphor satisfies a second condition of detecting only the color of the phosphor emitting light at a time T ₂ (t ₁ <T ₂ <t ₂ ); And
Determining that the security medium is genuine when all of the first condition and the second condition are satisfied, and forging otherwise;
Security medium reading method comprising a.

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