Counterfeit prevention body and display medium

Abstract

To provide a counterfeit prevention body with excellent tamper resistance.SOLUTION: A thin-film counterfeit prevention body 10 according to the present invention comprises a first main region 12 including a transparent layer, and a second main region 14 including both a transparent layer and a non-transparent layer. A boundary region 16 between the transparent layer and the non-transparent layer is provided between the first main region 12 and the second main region 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a display medium, such as an identification card, and a counterfeit prevention device applied thereto. [Background technology]

[0002] Conventionally, display media such as passports and national ID cards have been made of polycarbonate (hereafter abbreviated as "Polycarbonate") as a base material, with facial photographs printed on them using a laser printing method that uses the carbonization phenomenon caused by laser irradiation.

[0003] As a measure to prevent counterfeiting and tampering, this type of display media has a transparent hologram (hereinafter referred to as "transparent hologram") partially placed over the facial photograph, and by internally inserting and fusing each polycarbonate layer during lamination, it makes it difficult to replace the facial photograph. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Patent Publication No. WO2012 / 059208 [Patent Document 2] International Patent Publication No. WO2009 / 037332 Summary of the Invention [Problem to be solved by the invention]

[0005] However, since laser-printed facial photographs are monochrome images and the coloring function remains in the base material, they can be retouched with a laser, and therefore cannot be said to be highly resistant to counterfeiting.

[0006] To compensate for this, there is CMI / ML technology, which uses a laser to create another piece of information in addition to the face photo. With CMI / ML, for example, a lenticular lens is fused to the image, and the face photo and other information, such as an ID number, are printed on the face of the card at different angles of incidence. When the face of the card with this printing is tilted, the two pieces of information change and become visible.

[0007] An example of application of such CMI / ML technology will be described with reference to FIG.

[0008] FIG. 16(a) is a plan view of the identification card, and FIG. 16(b) is a schematic side view thereof.

[0009] In the display medium 60 realized as such an identification card, a first facial photograph A and a second facial photograph B are printed on a coloring sheet (printing core sheet) 71 on a polycarbonate substrate 70. In addition to the first facial photograph A and the second facial photograph B, a signature and personal information S are also printed on the coloring sheet 71.

[0010] The front side (upper side in the figure) of the first facial photograph A is partially covered with a transparent cover 72. The transparent cover 72 is provided with an optical effect that is highly visible and easy to identify.

[0011] The upper surfaces of the coloring sheet 71 and the transparent hologram 72 in the figure are protected by a protective sheet 73. The second facial photograph B is not covered by the transparent hologram 72, but a lenticular lens 74 is placed on the protective sheet 73 above the second facial photograph B.

[0012] With this configuration, the display medium 60 is resistant to attacks from the front side (upper side in the figure), and it is difficult to attempt to tamper with the first facial photograph A and the second facial photograph B from the front side (upper side in the figure).

[0013] On the other hand, the display medium 60 is not necessarily strong against attacks from the back side (the bottom side in the figure), and there is a risk that counterfeit or tampered products may be reproduced.

[0014] 16(c), for example, polycarbonate substrate 70 is scraped away from the back side (bottom side in the figure) of display medium 60 until it reaches first facial photograph A, and after reaching first facial photograph A, first facial photograph A is further scraped away to a depth that does not physically damage transparent hologram 72. Then, by fitting a counterfeit photograph C1 and a picture on the back side into substrate 70 from the back side in the place where first facial photograph A was previously located, there will be very little evidence of tampering when viewed from the front.

[0015] Because there is a risk that the first facial photograph A will be tampered with, it is being considered to use CMI / ML technology to create a second facial photograph B in addition to the first facial photograph A. However, in the case of an attack from the back, as with the first facial photograph A, if the polycarbonate base material 70 is scraped away from the back side (the lower side in the figure) of the display medium 60 down to the second facial photograph B without destroying the lenticular lens 74 on the top surface, as shown in Figure 16(c), then there is a risk that a forged photograph C2 will be inserted, just as in the case of the first facial photograph A, and the photograph will be forged without leaving any traces of tampering on the front, as shown in Figure 16(d).

[0016] Another drawback of CMI / ML technology is that it allows for laser marking.

[0017] Therefore, as shown in Figure 17(a), a burn-off layer 80 is formed using a material that has optical variability and a combination of transmittance and reflection properties, and the burn-off layer 80 is burned off with a laser to create a second facial photograph B, thereby changing the color of the second facial photograph B or changing it from a negative image to a positive image, thereby improving security.

[0018] For example, according to the technology called FUSE-ID by G&D (Veridos) and Mirage by HID, in order to compensate for the fact that the first facial photograph A is monochrome and can be retouched, a second facial photograph B that cannot be retouched and has optical effects can be realized by burning off selected parts of an optically variable material, a burn-off layer 80, with a laser.

[0019] Furthermore, this technology not only improves the visual anti-counterfeiting effect, but also allows the second facial photograph B to be applied to a different layer from the first facial photograph A, making it possible to create a structure in which the second facial photograph B cannot be counterfeited by non-destructively replacing or removing the optical elements.

[0020] However, the first facial photograph A is the one that is checked first during authentication. As mentioned above and as shown in Figure 17(b), the first facial photograph A still has the structural drawback that it can be replaced with a forged photograph C1 without destroying the hologram 72. Furthermore, because the two facial photographs A and B are positioned apart, it provides an opportunity for each photograph to be forged using an appropriate technique: as shown in Figure 17(b), the first facial photograph A can be replaced with a forged photograph C1, and as shown in Figures 17(c) to 17(f), the second facial photograph B can be forged using similar optical elements, physically removed from the top of the face, and replaced with a forged photograph C2.

[0021] In such a case, as shown in Figure 17(g), if the appraiser mainly evaluates the forged first facial photograph C1, there is a risk that the forged second facial photograph C2 will be mistakenly identified as the person in question, even if the quality of the photograph is poor.

[0022] Furthermore, if a metal vapor deposition layer such as aluminum is used as a reflective layer for the hologram 72, the optical effect becomes more visible, making it easier to authenticate counterfeits. However, if the metal vapor deposition layer is applied over the personal information S in the background, the personal information S is concealed and becomes invisible, making it unusable for protecting the personal information S. For this reason, the metal vapor deposition layer is limited to areas where the personal information S is not located. In such cases, a counterfeiter can remove part of the metal vapor deposition layer from the front or back and embed it in a counterfeit card, making it an insufficient countermeasure against tampering.

[0023] Furthermore, the hologram 72 used to protect the first facial photograph A is generally a hologram with a transparent reflective layer made of ZnS or TiO2 so that the background can be seen. This makes it possible to see the personal information S placed thereon through the transparent hologram, making it difficult for counterfeiters to replace it.

[0024] Compared to holograms with a metal vapor deposition layer such as aluminum (hereinafter referred to as "aluminum holograms"), transparent holograms may have inferior optical effect visibility or may be difficult to see. Therefore, to compensate for this, there is a technique in which transparent holograms and aluminum holograms are arranged in spots, and the aluminum hologram is installed only above the area without personal information S on the base of the aluminum hologram, and the transparent hologram is installed separately above the area where personal information S is printed.

[0025] However, although this technology improves design and provides better countermeasures against the creation of counterfeit products from scratch, it does not protect personal information S and is not an effective countermeasure against tampering.

[0026] As a countermeasure against tampering, Patent Document 1 discloses OVD Kinegram, a technology that makes aluminum visually translucent with a pattern to enhance background visibility and optical effects, but this is not an essential countermeasure against the above-mentioned tampering.

[0027] The present invention has been made in view of the above circumstances, and has as its object to provide a counterfeit prevention device that is highly tamper-resistant, and a display medium to which the same is applied. [Means for solving the problem]

[0028] In order to achieve the above object, the present invention takes the following measures.

[0029] A first aspect of the present invention is a thin film anti-counterfeiting device comprising a first main region including a transparent layer and a second main region including a transparent layer and a non-transparent layer, with a boundary between the transparent layer and the non-transparent layer between the first main region and the second main region.

[0030] A second aspect of the present invention is the counterfeit prevention device of the first aspect, wherein the non-transparent layer is a metal vapor deposition layer, and the image is formed by ablation writing with a laser on the metal vapor deposition layer.

[0031] A third aspect of the present invention is the anti-counterfeiting device of the first aspect, further comprising a boundary area in which the first main area and the second main area overlap, or are in contact without a boundary, or are composed of both the first main area and the second main area, the transparent layer being disposed across the first main area, the second main area, and the boundary area, and the non-transparent layer being disposed across the second main area and the boundary area, the transparent layer covering the first facial photograph in the first main area, and the non-transparent layer being used to form the second facial photograph in the second main area.

[0032] A fourth aspect of the present invention is the anti-counterfeiting device of the third aspect, wherein the first main region produces a first optical effect and the second main region produces a second optical effect.

[0033] A fifth aspect of the present invention is the anti-counterfeiting device of the fourth aspect, in which the first optical effect that appears in the space above the first main region continues to appear in the space above a portion of the boundary region and further to the space above a portion of the second main region.

[0034] A sixth aspect of the present invention is the anti-counterfeiting device of the fourth aspect, in which the first optical effect that appears in the space above the first main region appears in the space above the boundary region so as to gradually weaken toward the second main region.

[0035] A seventh aspect of the present invention is the anti-counterfeiting device of the fourth aspect, in which the first optical effect appearing in the space above the first main region appears in multiple geometric shapes from the space on the boundary between the first main region and the boundary region toward the second main region.

[0036] An eighth aspect of the present invention is the counterfeit prevention device of the fourth aspect, in which the first optical effect or the second optical effect appears in a space above the first main region and a space on the outer periphery of the second main region.

[0037] A ninth aspect of the present invention is the anti-counterfeiting device of the fourth aspect, in which the second optical effect appearing in the space above the second main region appears continuously from the second main region side to the space above the boundary region and even to the space above a part of the first main region.

[0038] A tenth aspect of the present invention is the anti-counterfeiting device of the fourth aspect, in which the second optical effect appearing in the space above the second main region appears in the space above the boundary region so as to gradually weaken toward the first main region.

[0039] An eleventh aspect of the present invention is the anti-counterfeiting device of the fourth aspect, wherein the second optical effect appearing in the space above the second main region appears to have an irregular terminal shape from the space on the boundary between the boundary region and the second main region toward the first main region.

[0040] A twelfth aspect of the present invention is the anti-counterfeiting device of the third aspect, in which the non-transparent layer is disposed continuously from the second main region side, through part of the boundary region, to part of the first main region.

[0041] A thirteenth aspect of the present invention is the anti-counterfeiting device according to the twelfth aspect, further comprising a non-transparent layer discretely disposed in the first main region.

[0042] A fourteenth aspect of the present invention is the anti-counterfeiting device of the first or second aspect, in which the non-transparent layer is arranged so as to become gradually thinner or gradually less dense from the first main region side to the second main region side.

[0043] A fifteenth aspect of the present invention is the anti-counterfeiting device of the first or second aspect, wherein the non-transparent layer is arranged so as to have an irregular end shape from the second main region side toward the first main region side.

[0044] A sixteenth aspect of the present invention is the counterfeit prevention device according to the fifteenth aspect, wherein a non-transparent layer is further disposed discretely in the first main region.

[0045] A seventeenth aspect of the present invention is the anti-counterfeiting device of the first or second aspect, further comprising a non-transparent layer disposed around the periphery to form a desired design.

[0046] An eighteenth aspect of the present invention is a thin film anti-counterfeiting device comprising a first main region including a transparent layer, a second main region including a transparent layer and a non-transparent layer, and an overlap region where the first main region and the second main region overlap.

[0047] A 19th aspect of the present invention is a display medium comprising a substrate on which a first image is drawn and an anti-counterfeiting body laminated to the substrate, wherein the anti-counterfeiting body comprises a first main region including a transparent layer and a second main region including a transparent layer and a non-transparent layer, wherein a boundary between the transparent layer and the non-transparent layer is present between the first main region and the second main region, and the second image is formed in the non-transparent layer included in the second main region, and the anti-counterfeiting body is arranged on the substrate so that the first main region covers at least a portion of the first image.

[0048] A twentieth aspect of the present invention is the display medium of the nineteenth aspect, wherein the first image and the second image are facial images of the same person printed using different printing methods. [Effects of the Invention]

[0049] According to the present invention, it is possible to provide a counterfeit prevention device having excellent tamper resistance and a display medium to which the counterfeit prevention device is applied. [Brief explanation of the drawings]

[0050] [Figure 1] FIG. 1 is a diagram illustrating a counterfeit prevention device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view showing an example of a state in which the counterfeit prevention device according to this embodiment is applied to a display medium. [Figure 3] Figure 3 shows an example in which a first facial photograph is partially covered with a transparent anti-counterfeiting material, and a second facial photograph is printed within the same thin film using a non-transparent anti-counterfeiting material that can be burned off with a laser. [Figure 4]FIG. 4 is a plan view of the anti-counterfeiting device showing a state in which the first optical effect appears to continue to a part of the second main region. [Figure 5] FIG. 5 is a plan view of an anti-counterfeiting device showing a state in which the first optical effect appears to become weaker in a gradational manner as it enters the second main region, or the second optical effect appears to become weaker in a gradational manner as it enters the first main region. [Figure 6] Figure 6 is a plan view of an anti-counterfeiting device showing the first optical effect or second optical effect, or a non-transparent metal layer appearing in numerous strips or geometric shapes near the boundary between the first main area and the second main area. [Figure 7] FIG. 7 is a plan view of the anti-counterfeiting device showing a state in which the first optical effect also appears in the space on the outer periphery of the second main region. [Figure 8] FIG. 8 is a plan view of the anti-counterfeiting device showing a state in which the second optical effect appears continuously up to a part of the first main region. [Figure 9] FIG. 9 is a plan view illustrating an example of a counterfeit prevention device showing a state in which the second optical effect appears in a gradational manner without a boundary with the first optical effect. [Figure 10] FIG. 10 is a plan view of an anti-counterfeiting device showing a state in which the boundary between the first optical effect and the second optical effect appears to have an irregular end shape. [Figure 11] FIG. 11 is a plan view illustrating an anti-counterfeiting device in which a metal vapor deposition layer is continuously and geometrically arranged up to a part of the first main region. [Figure 12] FIG. 12 is a plan view illustrating an example of a counterfeit prevention device in which the boundary between the transparent layer and the metal deposition layer is arranged in a gradation pattern. [Figure 13] FIG. 13 is a plan view illustrating an anti-counterfeiting structure in which the metal deposition layer 22 is arranged to have a geometrically irregular end shape. [Figure 14] FIG. 14 is a plan view illustrating an example of a counterfeit prevention device in which a metal vapor deposition layer having a complex pattern-like shape is arranged on the outer periphery. [Figure 15] FIG. 15 is a plan view illustrating an example of a counterfeit prevention device in which the first main region and the second main region overlap each other. [Figure 16]FIG. 16 is a plan view and a schematic side view of a typical identification card in which a first face region and a second facial photograph are generated using prior art. DETAILED DESCRIPTION OF THE INVENTION

[0051] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc., are not necessarily the same as those in reality. Furthermore, even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In this specification and each drawing, elements similar to those described above with reference to the previous drawings are designated by the same reference numerals, and detailed and redundant explanations will be omitted as appropriate.

[0052] (Forgery prevention body) FIG. 1 is a diagram illustrating an anti-counterfeiting device according to an embodiment of the present invention, in which FIG. 1(a) is a plan view showing the structural concept of the anti-counterfeiting device 10, FIG. 1(b) is a perspective view showing a first facial photograph A protected by the first main area 12 of the anti-counterfeiting device 10 and a second facial photograph B configured in the second main area 14, and FIG. 1(c) is an example of a side cross-sectional view showing the layer structure of the anti-counterfeiting device 10, along with the range of influence of the optical effects (first optical effect and second optical effect described below) produced by the anti-counterfeiting device 10.

[0053] 1(a), the anti-counterfeiting device 10 according to this embodiment is a thin film made of film or foil, and has a planar configuration including a first main region 12, a second main region 14, and a boundary region 16 disposed between the first main region 12 and the second main region 14. Note that the first main region 12, the second main region 14, and the boundary region 16 are conceptually separated regions, and the boundary between the first main region 12 and the boundary region 16, and the boundary between the second main region 14 and the boundary region 16 are not explicitly separated.

[0054] As shown in FIG. 1(c), the cross-sectional structure of the anti-counterfeiting device 10 is formed by laminating, from the bottom in the figure, an adhesive layer 21 provided over the entire plane, a metal vapor deposition layer 22 provided partially on the plane, a mask layer 23 provided partially on the plane, a transparent vapor deposition layer 24 provided over the entire plane, and an embossed layer 25 provided over the entire plane.

[0055] The adhesive layer 21 is used to adhere the anti-counterfeiting object 10 to a display medium, such as an identification card.

[0056] The metal deposition layer 22 is disposed in the second main region 14, and may extend to a portion of the boundary region 16 and a portion of the first main region 12. The metal deposition layer 22 forms a non-transparent hologram β, such as an aluminum hologram, that is light-reflective. A layer configuration in which the metal deposition layer 22 and the mask layer 23 are laminated on the top surface of the transparent deposition layer 24 may also be used.

[0057] The mask layer 23 is provided in the second primary region 14 and the boundary region 16 .

[0058] The transparent vapor deposition layer 24 is laminated on the mask layer 23 and provided over the entire flat surface of the anti-counterfeiting device 10. The transparent vapor deposition layer 24 is a layer made of, for example, ZnS or TiO2, and forms a transparent holo α.

[0059] The embossed layer 25 is laminated on the transparent deposition layer 24 or the mask layer 23 and is provided over the entire flat surface of the anti-counterfeiting device 10 .

[0060] 1(a), the mask layer 23 and the metal deposition layer 22 are provided in a continuous overlapping pattern in the boundary region 16. This makes it possible for the boundary region 16 to make the boundary between the first main region 12 and the second main region 14 unrecognizable. Specific configuration examples for achieving this will be described later.

[0061] In the second main region 14, the metal deposition layer 22 is burned off with a laser, and the facial photograph B is drawn on it. In this specification, to distinguish image B from the first facial photograph A described later, the facial photograph B will hereinafter be referred to as the "second facial photograph B." The anti-counterfeiting device 10 is applied to a display medium such as an identification document, for example, a passport or a national ID card. In this case, both the first facial photograph A and the second facial photograph B are facial images of the owner of the display medium.

[0062] The laser beam used to draw the second facial photograph B can be, for example, a solid-state laser such as a YVO4 or YAG laser with a wavelength of 1064 nm. A fiber laser can also be used. The laser light source can be pulse-driven or CW-driven. By adjusting the scanning speed, step width, and output repetition frequency of the laser beam, it is possible to adjust the individual pulse marks in the scanning direction of the laser beam in the burned-off area of the metal deposition layer 22, as well as the degree of overlap between pulse marks.

[0063] Here, the pulse mark can be a metal film removed by a laser beam. The outline of this pulse is curved rather than straight, so it does not emit diffracted light in a specific direction. In particular, if the pulse mark has rough edges, it has scattering properties, which can further weaken the diffracted light.

[0064] It is also preferable that the overlap is large, that is, the average diameter of five adjacent pulse marks and the distance between their centers of gravity are greater than 1 / 10 and less than 5 times the average diameter. If the pulse marks overlap too much, the edges will appear pseudo-linear.

[0065] On the other hand, if they are too far apart, unevenness is likely to occur due to variations in the local distances of the pulse marks. If the pulse marks are arranged linearly, diffracted light is likely to be emitted, but by varying the degree of overlap, i.e., by varying the distance between the centers of gravity of the pulse marks, and removing the metal vapor deposition layer 22 using the pulse marks, it is possible to suppress the emission of diffracted light in a specific direction.

[0066] In particular, when RGB subpixels are formed using a fine uneven structure and the metal deposition layer 22 of the subpixels is removed with a pulsed laser beam to form a color image, the pulse marks also become fine, so this effect is remarkable.

[0067] Furthermore, even when pixels formed by a diffraction grating structure or fine patterns are formed on the metal deposition layer 22 by fine etching, moire and the like are unlikely to occur with the patterns.

[0068] When the first image is drawn on the base material, the energy used to burn off the metal deposition layer 22 for the second facial photograph B is smaller than the energy used to draw the first image, making it possible to form an intricate image.

[0069] Furthermore, the image created by burning off the metal vapor deposition layer 22 is not limited to the second facial photograph B, but may also include geometric patterns or regular or irregular designs that form the background of the second facial photograph B, which has the effect of improving the visibility of the second facial photograph B.

[0070] Furthermore, the above-mentioned geometric patterns and regular or irregular designs may be formed by removing a portion of the metal vapor deposition layer in the second main area before forming the second facial photograph B, which is effective in forming a detailed image.

[0071] For example, the aluminum-deposited metal vapor deposition layer 22 is preferable from the viewpoints of not only having light reflectivity but also excellent efficiency in burning off with a laser. Note that instead of the aluminum-deposited metal vapor deposition layer 22, a sputtering layer in which aluminum is sputtered can also be used.

[0072] The transparent holograms α are provided over the entire plane, while the non-transparent holograms β can be provided over the entire second main region 14, or can be disposed in part of the boundary region 16 and part of the first main region 12.

[0073] For example, when an anti-counterfeiting device 10 in which a portion of the boundary region 16 contains non-transparent holo β and the first main region 12 does not contain non-transparent holo β is viewed from above, as illustrated in Figure 1(a), the second main region 14 containing non-transparent holo β and a portion of the boundary region 16 appear non-transparent, and the first main region 12 not containing non-transparent holo β and a portion of the boundary region 16 appear transparent.

[0074] By applying different optical effects to the transparently visible region and the non-transparently visible region, the necessary anti-counterfeiting effect can be obtained in each region. In this specification, the optical effect obtained from the transparently visible region is referred to as the first optical effect, and the optical effect obtained from the non-transparently visible region is referred to as the second optical effect.

[0075] By implementing the first optical effect and the second optical effect so that they overlap spatially, an optical effect in which the first optical effect and the second optical effect overlap each other may be obtained in the space above the boundary region 16.

[0076] In the space above the first main region 12, the first optical effect is dominant, but even in the space above the first main region 12, the closer to the boundary region 16, the higher the proportion of the second optical effect that overlaps with the first optical effect should be.

[0077] Similarly, the second optical effect is dominant in the space above the second main region 14, but even in the space above the second main region 14, the closer to the boundary region 16, the higher the proportion of the first optical effect that overlaps with the second optical effect should be.

[0078] (Example of application to display media) Next, an example of application of the counterfeit prevention device 10 having such a configuration to a display medium will be described.

[0079] FIG. 2 is a plan view showing an example of a state in which the counterfeit prevention device 10 according to this embodiment is applied to a display medium.

[0080] If the display medium 50 is an identification document such as a passport or a national ID card, an image of the owner's face is drawn, for example by a laser, on a substrate of the display medium 50, such as polycarbonate (hereinafter referred to as the "polycarbonate base material"), as illustrated as the first facial photograph A in Figure 2.

[0081] The anti-counterfeiting device 10 may be placed on the display medium 50 so that the first main area 12 covers a part of the first facial photograph A and so that the first facial photograph A is not included in the boundary area 16. In other words, the first facial photograph A is not included in the boundary area 16, and the second facial photograph B is not drawn either. In this state, the anti-counterfeiting device 10 is transferred to the polycarbonate base material of the display medium 50 and adhered to the polycarbonate base material by the adhesive layer 21.

[0082] In addition, the display medium 50 can also be applied with the anti-counterfeiting element 10 by embossing the polycarbonate sheet base material that constitutes the card itself and performing various vapor deposition processes, and then laminating the card (data page) to incorporate the anti-counterfeiting element 10.

[0083] If the first main area 12 of the anti-counterfeiting device 10 does not include a metal vapor deposition layer 22 or if the first main area 12 does not have a non-transparent holo β, the entire first main area 12 is transparent, so the first facial photograph A is visible even if part of it is covered by the first main area 12.

[0084] Since the metal vapor deposition layer 22 is non-transparent, when the first main area 12 includes the metal vapor deposition layer 22, when the first main area 12 is placed on the first facial photograph A, a part of the first facial photograph A is concealed.

[0085] However, when the first main region 12 includes the metal vapor deposition layer 22, the layout of the metal vapor deposition layer 22 is adjusted so that the concealment of the first facial photograph A by the metal vapor deposition layer 22 does not affect the recognition of the first facial photograph A. For example, even if a part of the first facial photograph A is concealed by the metal vapor deposition layer 22, as illustrated in Fig. 3, the concealment can be so limited that it does not affect the recognition of the first facial photograph A if it only conceals a part of the shoulder of the first facial photograph A.

[0086] Rather, by intentionally extending the non-transparent layer over a portion of the first facial photograph A, it becomes more difficult to tamper with the first facial photograph and the second facial photograph individually, and it is also possible to further increase the security of the display medium 50.

[0087] In this way, the first main area 12 can cover the upper surface of part of the first facial photograph A and protect part of the first facial photograph A without reducing the recognizability of the first facial photograph A drawn on the display medium 50.

[0088] 3, personal information such as a name or number may be printed on the identification card. In such a case, the anti-counterfeiting element 10 is placed on the display medium 50 so as to cover the personal information in the boundary area 16 and / or the first main area 12 where the metal vapor deposition layer 22 is not placed. In this way, the personal information can be made visible without being hidden by the metal vapor deposition layer 22.

[0089] In this way, the anti-counterfeiting device 10 implements on the same layer a first main area 12 having the function of protecting the first facial photograph A drawn on the display medium 50 in a recognizable state, and a second main area 14 having the function of creating the second facial photograph B.

[0090] According to the display medium 50 to which the anti-counterfeiting device 10 is applied in this manner, the characteristic configuration and optical effect of the anti-counterfeiting device 10 can further enhance the resistance to tampering.

[0091] This makes it difficult to forge or tamper with the first facial photograph A and the second facial photograph B by replacing, rewriting, adding to, or the like without physically destroying the anti-counterfeiting device 10, and even if someone attempts to forge or tamper with the photograph, traces of destruction will remain or the entire anti-counterfeiting device 10 will be forged and replaced, making it easy for an appraiser to visually recognize that it is a forgery.

[0092] For example, even if an attempt is made to forge the first facial photograph A by replacing it with another facial photograph from the back side of the display medium 50, if the second facial photograph is forged, physical damage will inevitably be inflicted on the transparent holo α and / or non-transparent holo β provided on the entire flat surface of the anti-counterfeiting device 10, thereby leaving traces of tampering, enabling an appraiser to identify the forgery.

[0093] On the other hand, even if an attempt is made to forge the second facial photograph B by replacing it with another facial photograph from the back side of the display medium 50, it is necessary to remove the anti-counterfeiting device 10 in order to extract the second facial photograph B. Therefore, physical damage will inevitably be inflicted on a portion of the transparent holo α or non-transparent holo β, leaving traces of tampering, and even if an attempt is made to forge and replace the entire anti-counterfeiting device 10, it will be difficult to accurately reproduce the hologram and second facial photograph, making it possible for an appraiser to identify the forgery.

[0094] Furthermore, even if someone attempts to carefully separate and scrape off the first facial photograph A and the second facial photograph B in order to forge the document, this would be extremely difficult because the boundary between the first main area 12 and the second main area 14 is unrecognizable. Even if such an attempt were made, physical damage would inevitably be inflicted on a portion of the transparent holo α or the non-transparent holo β, leaving traces of tampering, making it easy for an appraiser to identify the forgery.

[0095] Furthermore, even if an attempt is made to replace the first facial photograph A and / or the second facial photograph B from the surface of the display medium 50, if the anti-counterfeiting body 10 is completely forged and no replacement is attempted, physical damage will inevitably be inflicted on part of the transparent holo α or the non-transparent holo β, not only leaving traces of tampering but also changing the optical characteristics achieved by the superposition of the first optical effect and the second optical effect, making it easy for an appraiser to identify the counterfeit.

[0096] In this way, since counterfeiting can be identified by changes in optical properties, by giving the display medium 50 itself the ability to produce optical effects in addition to the anti-counterfeiting body 10, it is possible to increase the ease and reliability of identifying counterfeits.

[0097] For example, the display medium 50 may be provided with optical variability, such as changing color or image when tilted or rotated. Such optical variability can be realized by introducing a technology that has good visibility and outstanding optical variability, such as Crystalgram PC or Tint, without providing a metal vapor deposition layer.

[0098] Also, for example, the display medium 50 may be endowed with the function of making a dynamic motion image appear. This function can be realized by holding a fine pattern that allows the full-color image of the second facial photograph B to be displayed using CMY or RGB color elements in the transparent vapor deposition layer 24 disposed in the second main region 14 of the anti-counterfeiting device 10. It can also be realized by arranging an optically variable hologram structure, such as Illuminagram (registered trademark), around the second facial photograph B displayed in color in the anti-counterfeiting device 10. By arranging an optically variable hologram structure around the second facial photograph B, a dynamic motion effect can be imparted to a partial area, such as the outer peripheral region of the second facial photograph B.

[0099] In this way, by imparting optical properties not only to the anti-counterfeiting body 10 but also to the display medium 50, not only is the expressiveness of the display medium 50 improved, but in addition, it becomes possible to more easily identify counterfeits to the display medium 50, particularly counterfeits that involve replacing a photograph from the front side.

[0100] As described above, according to the present invention, it is possible to provide a counterfeit prevention device having excellent tamper resistance and a display medium to which the counterfeit prevention device is applied. [Example]

[0101] Next, a specific example of a configuration that can achieve the effect of making the boundary between the first main region 12 and the second main region 14 unrecognizable will be described.

[0102] 4 to 7 are plan views of the anti-counterfeiting device 10 showing a state in which a continuous or boundary-free structure is realized by promoting the first optical effect.

[0103] FIG. 4 is a plan view of the anti-counterfeiting device 10 showing that the first optical effect that appears in the space above the first main region 12 continues to the space above a portion of the boundary region 16 and further to the space above a portion of the second main region 14.

[0104] This causes the first optical effect to appear continuous from the space above the first main region 12 to the space above part of the boundary region 16 and further to the space above part of the second main region 14, making the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0105] FIG. 5 is a plan view of the anti-counterfeiting device 10 showing that the first optical effect that appears in the space above the first main region 12 gradually weakens in a gradational manner toward the second main region 14 in the space above the boundary region 16.

[0106] This causes the first optical effect to appear in a gradational manner, becoming weaker from the first main region 12 side toward the second main region 14 side, making the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0107] FIG. 6 is a plan view of the anti-counterfeiting device 10 showing the first optical effect appearing in the space above the first main region 12, and appearing in a number of strips or geometric shapes from the space on the boundary between the first main region 12 and the boundary region 16 toward the second main region 14.

[0108] The strips are not limited to a rectangular shape, but may have an irregular shape including a curved line. The shape, width, and length of each strip may be random.

[0109] This causes the first optical effect to appear irregularly and continuously from the first main region 12 side to the second main region 14 side, making the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0110] FIG. 7 is a plan view of the anti-counterfeiting device 10 showing a state in which the first optical effect appears not only in the space above the first main region 12 but also in the space on the periphery of the second main region 14. In FIG.

[0111] As a result, the second optical effect appearing in the space above the second main region 14 is surrounded by the first optical effect appearing on the outer periphery of the second main region 14, resulting in the appearance of a complex optical effect, making it possible to make the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0112] 4 to 7 are not limited to being implemented singly, but any two or more of them may be implemented in combination as appropriate, thereby making the boundary between the first main region 12 and the second main region 14 even more unrecognizable.

[0113] 8 to 10 are plan views of the anti-counterfeiting device 10 that realizes a continuous or boundary-free structure by promoting the second optical effect.

[0114] FIG. 8 is a plan view of the anti-counterfeiting device 10 showing that the second optical effect that appears in the space above the second main region 14 appears continuously from the second main region 14 side to the space above the boundary region 16 and further to the space above a part of the first main region 12.

[0115] This causes the second optical effect to appear continuous from the space above the second main region 14 to the space above the boundary region 16 and even to the space above a portion of the first main region 12, making the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0116] FIG. 9 is a plan view illustrating an example of the anti-counterfeiting device 10, showing a state in which the second optical effect that appears in the space above the second main region 14 gradually weakens in a gradational manner toward the first main region 12 in the space above the boundary region 16.

[0117] This causes the second optical effect to appear in a gradational manner, becoming weaker from the second main region 14 side toward the first main region 12 side, making it possible to make the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0118] FIG. 10 is a plan view of the anti-counterfeiting device 10 showing that the second optical effect that appears in the space above the second main region 14 appears from the space on the boundary between the boundary region 16 and the second main region 14 toward the first main region 12, with an irregular terminal shape.

[0119] This causes the second optical effect to appear irregularly and continuously from the second main region 14 side to the first main region 12 side, making the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0120] 8 to 10 are not limited to being implemented singly, but two or more of them may be implemented in combination as appropriate, thereby making the boundary between the first main region 12 and the second main region 14 even more unrecognizable.

[0121] 11 to 14 are plan views of the anti-counterfeiting device 10 showing examples of the configuration of the metal vapor deposition layer 22 for making the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0122] FIG. 11 is a plan view illustrating an example of a counterfeit prevention device 10 in which a metal vapor deposition layer 22 is continuously disposed from the second main region 14 side through a part of the boundary region 16 to a part of the first main region 12.

[0123] In this configuration, the metal vapor deposition layer 22 may include not only a continuous layer but also a layer that is provided discretely, as indicated by the asterisks in FIG.

[0124] FIG. 12 is a plan view illustrating an example of an anti-counterfeiting device 10 in which the metal vapor deposition layer 22 is arranged in a gradational manner, specifically, so as to become gradually thinner or gradually lower in density from the first main region 12 side to the second main region 14 side.

[0125] FIG. 13 is a plan view illustrating an example of the anti-counterfeiting device 10 in which the metal vapor deposition layer 22 is arranged so as to have an irregular end shape from the second main region 14 side toward the first main region 12 side.

[0126] In this case, the metal deposition layer 22 may also include layers that are provided discretely, as indicated by the asterisks in FIG. 13, in addition to layers that are continuously disposed.

[0127] FIG. 14 is a plan view illustrating an example of a counterfeit prevention device 10 in which a metal vapor deposition layer 22 having a complex pattern-like shape is arranged on the outer periphery.

[0128] The metal vapor deposition layer 22 having the shape exemplified in Figures 11 to 14 can be formed by a wet etching method using a mask layer 23, a laser burn-off method, a plating method, a pattern vapor deposition method, or the like, and can be formed by carrying out any one of these methods or by carrying out any two or more of these methods.

[0129] According to the configurations formed by these techniques as illustrated in Figures 11 to 14, the boundary between the first optical effect and the second optical effect becomes irregular, making it possible to make the boundary between the first main region 12 and the second main region 14 unrecognizable.

[0130] 11 to 14 are not limited to being implemented singly, but may be implemented by appropriately combining two or more of them, thereby making the boundary between the first main region 12 and the second main region 14 even more unrecognizable.

[0131] As illustrated in Figures 4 to 14, by configuring the first facial photograph A and the second facial photograph B to cross continuously without a boundary, the anti-counterfeiting device 10 appears with the first optical effect and the second optical effect continuously overlapping in a complex manner, making it possible to make the boundary between the first main area 12 and the second main area 14 unrecognizable.

[0132] Although the best mode for carrying out the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such a configuration. Those skilled in the art may conceive of various modifications and alterations within the scope of the technical ideas of the invention as defined in the claims, and it is understood that such modifications and alterations also fall within the technical scope of the present invention.

[0133] For example, in the above embodiment, the anti-counterfeiting device 10 has a boundary region 16, but as shown in Figure 15, an overlap region 18 in which the first main region 12 and the second main region 14 overlap may be provided, thereby making the anti-counterfeiting device 11 not have a boundary region 16.

[0134] Even in the case of an anti-counterfeiting device 11 that does not have a boundary region 16 in this way, it is possible to achieve the same effect as the anti-counterfeiting device 10 by applying to the overlap region 18, for example, a configuration that promotes the first optical effect as shown in Figures 4 to 7, a configuration that promotes the second optical effect as shown in Figures 8 to 10, and a configuration for the metal vapor deposition layer 22 as shown in Figures 11 to 14. [Explanation of symbols]

[0135] 10, 11 Anti-counterfeit body 12 1st main area 14 Second main area 16 Boundary area 18 Overlap Area 21 Adhesive layer 22 Metal evaporated layer 23 Mask Layer 24 Transparent vapor deposition layer 25 embossed layer 50 Display media 60 Display media 70 Polycarbonate base material 71 Coloring Sheet 72 Transparent Holo 73 Protective Sheet 74 Lenticular Lens 80 Burn-off Layer A. First face photo B. Second face photo C1 First face photo (fake photo) C2 Second face photo (fake photo) S Personal information α transparent holo β non-transparent holo

Claims

1. A thin film-like anti-counterfeiting body, a first main region including a transparent layer; a second main region including the transparent layer and a non-transparent layer; A counterfeit prevention device, wherein a boundary between the transparent layer and the non-transparent layer is present between the first main region and the second main region.

2. the non-transparent layer is a vapor-deposited metal layer, 2. The counterfeit prevention device according to claim 1, wherein the image is formed by laser ablation imaging on the metal vapor deposition layer.

3. The first and second main regions may overlap or contact each other without a boundary, or the first and second main regions may be adjacent to each other in a boundary region. the transparent layer is disposed across the first main region, the second main region, and the boundary region; the non-transparent layer is disposed across the second main region and the boundary region; the transparent layer covers the first facial photograph in the first main area; The anti-counterfeiting device according to claim 1 , wherein the non-transparent layer is used to form a second facial photograph in the second main area.

4. the first primary region exhibits a first optical effect; The anti-counterfeiting device according to claim 3 , wherein the second main region produces a second optical effect.

5. 5. The anti-counterfeiting device according to claim 4, wherein the first optical effect that appears in the space above the first main region continues to appear in the space above a portion of the boundary region and further to the space above a portion of the second main region.

6. 5. The counterfeit prevention device according to claim 4, wherein the first optical effect that appears in the space above the first main region appears in the space above the boundary region so as to become gradually weaker toward the second main region.

7. 5. The anti-counterfeiting device according to claim 4, wherein the first optical effect appearing in the space above the first main region appears in a number of geometric shapes from the space on the boundary between the first main region and the boundary region toward the second main region.

8. The counterfeit prevention device according to claim 4 , wherein the first optical effect or the second optical effect appears in a space above the first main region and a space on the outer periphery of the second main region.

9. 5. The anti-counterfeiting device according to claim 4, wherein the second optical effect appearing in the space above the second main region appears continuously from the second main region side to the space above the boundary region and further to the space above a part of the first main region.

10. 5. The counterfeit prevention device according to claim 4, wherein the second optical effect that appears in the space above the second main region appears in the space above the boundary region so as to become gradually weaker toward the first main region.

11. 5. The anti-counterfeiting device according to claim 4, wherein the second optical effect appearing in the space above the second main region appears to have an irregular terminal shape from the space on the boundary between the boundary region and the second main region toward the first main region.

12. 4. The counterfeit prevention device according to claim 3, wherein the non-transparent layer is disposed continuously from the second main region side to a part of the first main region through a part of the boundary region.

13. The counterfeit prevention device according to claim 12 , wherein the non-transparent layer is further disposed discretely in the first main region.

14. 3. The counterfeit prevention device according to claim 1, wherein the non-transparent layer is disposed so as to become gradually thinner or gradually lower in density from the first main region side to the second main region side.

15. 3. The counterfeit prevention device according to claim 1, wherein the non-transparent layer is disposed so as to have an irregular end shape from the second main region side toward the first main region side.

16. The counterfeit prevention device according to claim 15, wherein the non-transparent layer is further disposed discretely in the first main region.

17. The counterfeit prevention device according to claim 1 or 2, wherein the non-transparent layer is further arranged on the periphery to form a desired design.

18. A thin film-like anti-counterfeiting body, a first main region including a transparent layer; a second main region including the transparent layer and the non-transparent layer; The counterfeit prevention device includes an overlap region in which the first main region and the second main region overlap.

19. a substrate having a first image formed thereon; a counterfeit prevention body laminated on the base material, the anti-counterfeiting object comprises a first main region including a transparent layer and a second main region including the transparent layer and a non-transparent layer, a boundary between the transparent layer and the non-transparent layer is between the first main region and the second main region, and a second image is formed on the non-transparent layer included in the second main region; The anti-counterfeiting body is disposed on the substrate such that the first main region covers at least a portion of the first image.

20. The display medium according to claim 19 , wherein the first image and the second image are facial images of the same person printed using different printing methods.

Images