JP4871109B2 - Anti-counterfeit media - Google Patents

Description

  The present invention relates to an anti-counterfeit medium such as an anti-counterfeit sheet, and more particularly to an anti-counterfeit structure using a latent image.

  In the past, counterfeit crimes have frequently occurred in securities such as prepaid cards, various admission tickets, gift certificates and stock certificates because they are widely distributed and can be exchanged relatively easily. In particular, in recent years, with the improvement and popularization of copying machines such as color copiers, counterfeit products that cannot be easily distinguished from genuine products can be manufactured relatively easily, and countermeasures against counterfeiting are required. Yes. Moreover, measures against counterfeiting are required not only for the above-mentioned securities but also for banknotes.

  As one of countermeasures against such counterfeiting, a technique that enables authenticity determination of securities and banknotes using a latent image is considered, and is disclosed in, for example, Patent Document 1.

  The technique disclosed in Patent Document 1 includes a plurality of printed lines on a sheet base material, parallel to the printed lines, a part extending in a direction orthogonal to the printed lines, and a cross section The raised relief line is provided to raise the latent image depending on the viewing direction. When the substrate is viewed from the front, all the printed lines are visible. However, when the viewing direction is changed to the direction perpendicular to the printing lines and relief lines, the portion of the printing lines where the relief lines extend is visible behind the extended relief lines. While not possible, the other parts of the printed line remain visible. Thereby, a latent image corresponding to the shape of the relief line can be raised.

In this way, in the case of a sheet base material provided with a relief line with a raised cross section, the printed information including the printed line printed on the surface is copied, but the raised shape of the relief line is reproduced. Can not. For this reason, even if the viewing direction of the copy is changed, the latent image does not appear, thereby making it possible to determine authenticity.
JP 2000-313161 A

In order to achieve the above object, the present invention provides:
A background color region provided on the substrate surface;
A plurality of periodic color arrangement regions having a different color from the background color region, and configured in rows and columns on the background color region and provided at a constant period;
In a predetermined area of the background color area, in parallel with the arrangement direction of the plurality of periodic color regions constitute rows and columns, each of the two regions separated by parallel arbitrary center line to the substrate surface A plurality of first convex portions formed at the constant period so that the areas of the background color area and the periodic color arrangement area are different from each other;
In the background color region other than the predetermined region, a row and a column are formed in parallel with the arrangement direction of the plurality of periodic coloration regions and shifted with respect to the rows and columns of the plurality of first convex portions. The areas of the background color region and the periodic coloration region are different from each other in each of the two regions separated by the center line parallel to the center line, and the size relationship of the areas is the first region. An anti-counterfeit medium having a plurality of second convex portions formed at the predetermined period so as to be reversed with respect to a region on the same direction side through the center line in the convex portion.
The first and second protrusions have a circular bottom.
The background color area and the periodic color arrangement area are each composed of a single color.
The periodic color arrangement region has a circular shape.

  The present invention has been made in view of the problems of the conventional techniques as described above, and provides a forgery prevention medium capable of easily performing authenticity determination by a latent image without being limited to the viewing direction. The purpose is to provide.

In order to achieve the above object, the present invention provides:
A background color region provided on the substrate surface;
A plurality of periodic color arrangement regions having a different color from the background color region, and configured in rows and / or columns on the background color region and provided at a constant period;
Two regions that form rows and / or columns in a predetermined region of the background color region in parallel with the arrangement direction of the plurality of periodic coloration regions and are separated by an arbitrary center line parallel to the substrate surface A plurality of first protrusions formed at the constant period such that the areas of the background color area and the periodic coloration area are different from each other,
In a region other than the predetermined region in the background color region, a row parallel to the arrangement direction of the plurality of periodic coloration regions and shifted from the rows and / or columns of the plurality of first protrusions and / or Alternatively, the areas of the background color region and the periodic coloration region are different from each other in each of two regions constituting a column and separated by a center line parallel to the center line, and the size relationship of the areas is: A plurality of second convex portions formed at the predetermined period so as to be reversed with respect to a region on the same direction side through the center line in the first convex portion.

  In the present invention configured as described above, when the substrate is viewed from the front, a plurality of rows and / or columns provided in the background color region on the surface of the substrate with colors different from the background color region are provided. Periodic color scheme regions are recognized. A plurality of first convex portions and second convex portions are formed on the base material, but when the base material is viewed from the front, the convex shape of the first convex portion and the second convex portion is Since it is visually recognized from the top side toward the bottom side, only a plurality of periodic color arrangement regions constituting the rows and / or columns are recognized, and the latent image does not appear to appear. When the viewing direction is changed from this state to a direction that forms an acute angle with the substrate surface, only the viewing direction side of the plurality of first protrusions and second protrusions formed on the substrate is visible. It will become. At this time, each of the plurality of first convex portions is formed such that the areas of the background color region and the periodic color arrangement region are different from each other in two regions separated by an arbitrary center line parallel to the substrate surface. In addition, each of the plurality of second convex portions has two areas separated from each other by a center line parallel to the center line of the first convex portion. It is different and the size relationship of the areas is formed so as to be reversed with respect to the region on the same direction side through the center line in the plurality of first convex portions, so that the viewing direction is relative to the substrate surface. If the first convex portion and the second convex portion are changed in a direction that forms an acute angle, a background color region and a periodic color arrangement region in a region on the viewing direction side through a center line orthogonal to the viewing direction. The size relationship between and is reversed, The color of the background color region and the color of the periodic coloration region are different between the first convex portion and the second convex portion, and the plurality of first convex portions or the plurality of second convex portions are different depending on the color difference. The latent image by the part appears and appears. Here, in the present invention, the background color region and the periodic coloration region in each of two regions where the first convex portion and the second convex portion are separated by an arbitrary center line parallel to the substrate surface, Are formed so that their areas are different from each other, and the magnitude relation of the areas is mutually reversed in the region on the same direction side through the center line, so that the area is visually recognized from which direction forms an acute angle with the substrate surface. Even in this case, the first convex portion and the second convex portion have different colors that can be seen depending on the color of the background color region and the color of the periodic color arrangement region, and the plurality of first convex portions are different depending on the color difference. Alternatively, the latent image formed by the plurality of second protrusions appears to appear. At this time, the size relationship between the area of the background color region and the periodic color arrangement region on the viewing direction side changes through the center line in each of the first convex portion and the second convex portion depending on the viewing direction. The relationship between the color of the latent image that emerges and the background changes, making it easier to recognize the latent image.

  As described above, in the present invention, a plurality of periodic color arrangement regions having different colors from the background color region are provided in the background color region so as to form rows and / or columns. Each of the plurality of first protrusions formed by forming rows and / or columns in parallel with the arrangement direction of the plurality of periodic color arrangement regions is separated by an arbitrary center line parallel to the substrate surface. The areas of the background color area and the periodic color arrangement area are different from each other in each of the two areas, and the areas other than the predetermined area of the background color area are parallel to the arrangement direction of the plurality of periodic color arrangement areas, and Each of the plurality of second convex portions formed by constituting a row and / or a column shifted from the row and / or column of the first convex portion is parallel to the center line of the first convex portion. Each of the two areas separated by the center line has a background color area and a periodic color scheme. Are different from each other, and the magnitude relation of the areas is reversed with respect to the region on the same direction side through the center line in the plurality of first convex portions, so that the acute angle with respect to the substrate surface Even when viewed from any direction, the colors that can be seen by the color of the background color region and the color of the periodic coloration region are different between the first convex portion and the second convex portion. The latent images formed by the plurality of first protrusions or the plurality of second protrusions appear to be raised, and the authenticity determination by the latent images can be easily performed without being limited to the viewing direction. In addition, depending on the viewing direction, the size relationship between the background color region and the periodic coloration region on the viewing direction side changes through the center line in each of the first and second convex portions, and thus emerges. The relationship between the color of the latent image and the background changes, making it easier to recognize the latent image.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an anti-counterfeit sheet that is an embodiment of the anti-counterfeit medium of the present invention, (a) is a diagram showing the overall configuration, and (b) is an anti-counterfeit structure shown in (a). 10 is a diagram showing a detailed configuration of FIG. 10, (c) is a cross-sectional view taken along line XX ′ shown in (b), (d) is a plan view of the convex portion 13 shown in (b), and (e) is (b). The top view of the convex part 14 shown to (f) is the perspective view seen from the A direction in the figure of the convex part 13 shown to (b), (g) is the figure of the convex part 14 shown to (b). It is the perspective view seen from A direction.

  As shown in FIG. 1, the forgery prevention sheet 1 of the present embodiment is configured by providing a forgery prevention structure 10 in a partial region of a sheet base 2 made of paper. The sheet base material 2 has a flat surface portion 3 that becomes the surface of the base material, and an information printing region 4 is provided in a partial region of the flat surface portion 3 and a forgery prevention structure 10 is provided in another region. . The anti-counterfeit sheet 1 configured in this manner can be used as an entrance ticket for a concert, for example. In this case, the contents of the concert, the venue name, the seat number, etc. are printed in the information printing area 4. In addition, before the information is printed in the information printing area 4 of the sheet base material 2, it may be possible to print a tint block or precolor the sheet base material 2 as a pre-print. In this case, it is necessary not to make it difficult to see the latent image by the forgery prevention structure 10.

  As shown in FIG. 1B, the forgery prevention structure 10 provided on the sheet base material 2 has a background on a background color region 12 made of the same white color as the base color of the flat surface portion 3 of the sheet base material 2. A plurality of periodic color arrangement regions 11 made of black different from the color region 12 are provided. The plurality of periodic color arrangement regions 11 are formed in a matrix by forming rows and columns on the background color region 12 and being provided with a constant period.

  In the region where the plurality of periodic coloration regions 11 are provided in a matrix, the plurality of first convex portions 13 constituting the first convex portion group and the plurality of second convex portions constituting the second convex portion group Convex part 14 is formed. As shown in FIGS. 1C, 1F, and 1G, these convex portions 13 and 14 have a shape in which the apex portion is removed from the cone, and the sheet base 2 is flattened with an embossed plate or the like. Side surfaces 13a and 14a are formed by being recessed from about 3 to about 0.05 to 0.1 mm, and the same surface as the flat surface portion 3 is the top portions 13b and 14b. The cross-sectional area gradually increases from the top portions 13b and 14b toward the recess direction of the sheet base material, and the bottom portions of the convex portions 13 and 14 have a circular shape with a diameter of 0.5 mm or less.

  The first convex portion 13 constituting the first convex portion group is formed in a predetermined region of the background color region 12 so as to express the letter “T” that becomes a latent image by the shape of the first convex portion group. ing. The convex portions 13 are formed in the same cycle as the plurality of periodic color arrangement regions 11, and the row and column directions for forming the letter “T” are the arrangement direction of the plurality of periodic color arrangement regions 11. Although parallel, the rows and columns are shifted from the rows and columns of the plurality of periodic color arrangement regions 11. Thereby, as shown in FIG.1 (c), in one area | region in the case where it isolate | separates by the centerline parallel to the surface of the sheet | seat base material 2, the area of the periodic coloration area | region 11 is the area of the background color area | region 12 In the other region, the area of the background color region 12 is larger than the area of the periodic color arrangement region 11, and each of the two regions separated by the center line is different from the periodic color arrangement region 11 and the background color. The areas of the region 12 are different from each other. In addition, in FIG.1 (c), although the center line orthogonal to the visual recognition direction at the time of visually confirming the convex part 13 from A direction in FIG. If it is parallel to the surface, it can be arbitrarily set by the convex portion 13, and the convex portion 13 is composed of a periodic color arrangement region 11 and a background color region 12 in each of two regions separated by the arbitrarily set center line. The areas are different from each other.

  Further, the plurality of convex portions 14 constituting the second convex portion group are formed so as to surround an area where the plurality of convex portions 13 constituting the first convex portion group are formed in the background color region 12. Yes. The convex portions 14 are formed in the same cycle as the plurality of periodic color arrangement regions 11, and the row and column directions thereof are parallel to the arrangement direction of the plurality of periodic color arrangement regions 11. The columns are shifted from the rows and columns of the plurality of periodic color arrangement regions 11. Thereby, as shown in FIG.1 (d), in one area | region in the case where it isolate | separates by the centerline parallel to the surface of the sheet | seat base material 2, the area of the background color area | region 12 is the area of the periodic color arrangement area | region 11 In the other region, the area of the periodic color arrangement region 11 is larger than the area of the background color region 12, and each of the two regions separated by the center line is separated from the periodic color arrangement region 11 and the background color. The areas of the region 12 are different from each other. In addition, in FIG.1 (d), although the centerline orthogonal to the visual recognition direction at the time of visually confirming the convex part 14 from A direction in FIG.1 (b) is shown, this centerline is the sheet | seat base material 2 of FIG. If it is parallel to the surface, it can be arbitrarily set by the convex portion 14, and the convex portion 14 has a periodic color arrangement region 11 and a background color region 12 in each of two regions separated by the arbitrarily set center line. The areas are different from each other. Further, the rows and columns of the plurality of convex portions 14 are also shifted from the rows and columns of the plurality of convex portions 13.

  As shown in FIGS. 1 (c) and 1 (d), the plurality of convex portions 13 and 14 configured in this way are arranged in the same direction side through the center lines parallel to each other. In the portion 14, the size relationship between the areas of the periodic color arrangement region 11 and the background color region 12 is reversed. Specifically, in the upper left region in the figure through the center line of the convex portion 13, the area of the periodic color arrangement region 11 is larger than the area of the background color region 12 as shown in FIG. In the upper left region in the figure via the center line of the portion 14, the area of the background color region 12 is larger than the area of the periodic color arrangement region 11 as shown in FIG. 13, the area of the background color area 12 is larger than the area of the periodic color arrangement area 11 as shown in FIG. Accordingly, in the lower right region in the figure, the area of the periodic coloration region 11 is larger than the area of the background color region 12 as shown in FIG.

  Note that the forgery prevention structure 10 illustrated in the present embodiment has 100 periodic coloration regions 11 formed in a 10 × 10 matrix for the sake of simplicity of explanation, but if the number is increased, The more the character that becomes a latent image that can be lifted by the anti-counterfeit structure 10 can be made finer, and a curve or the like can be easily expressed.

  Below, the manufacturing method of the forgery prevention sheet 1 comprised as mentioned above is demonstrated.

  First, 100 periodic coloration regions 11 are printed in black in a 10 × 10 matrix shape in a region where the anti-counterfeit structure 10 of the sheet base material 2 is provided, that is, a region which becomes a white background color region 12. The printing of the periodic color arrangement region 11 may be performed simultaneously with the pre-printing as described above, or may be performed after the pre-printing is performed.

  Next, the convex part 13 which comprises a 1st convex part group by pressing an embossing plate from the plane part 3 side of the sheet base material 2 to the area | region where the periodic coloration area | region 11 was printed, and 2nd convex part group The convex part 14 which comprises is formed. The convex portions 13 constituting the first convex portion group have the same period as that of the plurality of periodic color arrangement regions 11 in a predetermined region that forms “T” serving as a latent image among the regions in which the periodic color arrangement regions 11 are printed. The rows and columns are formed in parallel with the arrangement direction of the plurality of periodic color arrangement regions 11 and shifted from the rows and columns of the plurality of periodic color arrangement regions 11. Moreover, the convex part 14 which comprises a 2nd convex part group surrounds the area | region in which the some convex part 13 which comprises a 1st convex part group was formed among the area | regions where the periodic coloration area | region 11 was printed. In addition, in the same period as the plurality of periodic color arrangement regions 11, parallel to the arrangement direction of the plurality of periodic color arrangement regions 11 and shifted with respect to the plurality of periodic color arrangement regions 11 and the rows and columns of the plurality of convex portions 13. Form rows and columns. Such convex portions 13 and 14 are formed of an embossed plate in which the convex portion 13 is disposed between the plurality of periodic color arrangement regions 11 and the convex portion 14 is disposed on the plurality of periodic color arrangement regions 11. On the other hand, it can be considered that the rows and columns of the plurality of convex portions 13 and 14 and the rows and columns of the periodic coloration region 11 are shifted so as to be shifted while being parallel to each other.

  As described above, the anti-counterfeit sheet 1 is manufactured, and then information corresponding to the application is printed on the information printing area 4 of the sheet base 2 and used.

  Below, the effect | action of the forgery prevention sheet 1 mentioned above is demonstrated.

  First, the operation when the anti-counterfeit sheet 1 shown in FIG. 1 is viewed from the front, that is, from the normal direction of the flat portion 3 of the sheet substrate 2 will be described.

  FIG. 2 is a view for explaining the operation when the anti-counterfeit sheet 1 shown in FIG. 1 is viewed from the front, and shows how the anti-counterfeit structure 10 is seen.

  When the anti-counterfeit sheet 1 shown in FIG. 1 is viewed from the front, that is, from the normal direction of the flat portion 3, the anti-counterfeit structure 10 has a white background color region 12 as shown in FIG. On the other hand, since the plurality of periodic color arrangement regions 11 provided in a matrix form in the background color area 12 are black, the plurality of periodic color arrangement areas 11 in the matrix form are recognized. At this time, a plurality of convex portions 13 and 14 are formed on the sheet base material 2. When the anti-counterfeit sheet 1 is viewed from the front, the bottom portion from the top portions 13b and 14b of the convex portions 13 and 14 is obtained. Since the convex portions 13 and 14 are not easily recognized, the plurality of periodic color arrangement regions 11 are only recognized in a matrix shape, and the latent image “T” does not appear to appear.

  Next, an operation in the case where the viewing direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front, that is, from the normal direction of the flat portion 3 of the sheet base material 2 will be described.

  FIG. 3 is a diagram for explaining the operation when the viewing direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front, and (a) is viewed from the direction A in FIG. 1 (b). The figure which shows the state of the convex part 13 at the time of doing, (b) is a figure which shows the state of the convex part 14 at the time of visually recognizing from the A direction in FIG.1 (b), (c) is the A direction in FIG.1 (b). The figure which shows the appearance of the forgery prevention structure 10 at the time of visually recognizing from FIG. 1, (d) is the figure which shows the state of the convex part 13 at the time of visually recognizing from B direction in FIG.1 (b), (e) is FIG. b) The figure which shows the state of the convex part 14 at the time of visually recognizing from B direction, (f) is a figure which shows the appearance of the forgery prevention structure 10 at the time of visually recognizing from B direction in FIG.1 (b). In FIG. 3, the periodic color arrangement region 11 and the background color region 12 in the region other than the convex portions 13 and 14 are omitted for easy understanding of the operation in this embodiment.

  When the viewing direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front to the A direction in FIG. 1 (b), the respective viewing direction sides of the plurality of convex portions 13 and 14, that is, FIG. 1 (b). Only the side surfaces 13a and 14a on the middle A side and the top portions 13b and 14b become visible. Then, as shown in FIG.1 (c), in the some convex part 13, when it isolate | separates in the centerline orthogonal to the visual recognition direction at the time of visualizing from A direction in FIG.1 (b), it is a visual recognition direction In the region on the side, the area of the periodic color arrangement region 11 is larger than the area of the background color region 12, and as shown in FIG. Since the area of the background color area 12 is larger than the area of the periodic color arrangement area 11 in the area on the side of the visual recognition direction when separated from the center line perpendicular to the visual recognition direction when viewed from the middle A direction, 3 (a) and 3 (b), the convex portion 13 and the convex portion 14 have different colors that are visible depending on the color of the periodic color arrangement region 11 and the color of the background color region 12 in the entire viewing direction side. become. Specifically, when the convex portion 13 is viewed from the A direction in FIG. 1B, the area of the periodic color arrangement region 11 made of black is larger than the area of the background color region 12 made of white, so that it becomes dark gray. 1B. When the convex portion 14 is viewed from the direction A in FIG. 1B, the area of the background color region 12 made of white is larger than the area of the periodic color arrangement region 11 made of black, so that it looks light gray. Become.

  As a result, as shown in FIG. 3C, the anti-counterfeit structure 10 as a whole has a plurality of light gray backgrounds formed by a plurality of convex portions 14 when viewed from the direction A in FIG. A dark gray latent image “T” due to the convex portion 13 of the surface of the projection becomes visible.

  Moreover, when the visual recognition direction with respect to the forgery prevention sheet 1 shown in FIG. 1 is changed from the front to the B direction in FIG. 1B, the visual recognition direction side of each of the plurality of convex portions 13 and 14, that is, FIG. b) Only the side surfaces 13a, 14a and the top portions 13b, 14b on the middle B side become visible. Then, as shown in FIG. 1C, the plurality of convex portions 13 are viewed in the viewing direction when separated from the center line perpendicular to the viewing direction when viewed from the B direction in FIG. In this area, the area of the background color area 12 is larger than the area of the periodic color arrangement area 11, and as shown in FIG. 1 (d), the plurality of convex portions 14 are in the B direction in FIG. 1 (b). 3 (d), since the area of the periodic color arrangement region 11 is larger than the area of the background color region 12 in the region on the viewing direction side when separated by a center line orthogonal to the viewing direction when viewed from above. , (E), the convex portion 13 and the convex portion 14 have different colors that are visible depending on the color of the periodic color arrangement region 11 and the color of the background color region 12 in the entire viewing direction side. Specifically, when the convex portion 13 is viewed from the direction B in FIG. 1B, the area of the background color region 12 made of white is larger than the area of the periodic color arrangement region 11 made of black, so that it becomes light gray. 1B, when the convex portion 14 is viewed from the B direction in FIG. 1B, the area of the periodic color arrangement region 11 made of black is larger than the area of the background color region 12 made of white, so that it looks dark gray. Become.

  As a result, as shown in FIG. 3 (f), the anti-counterfeit structure 10 as a whole has a plurality of dark gray backgrounds with a plurality of convex portions 14 when viewed from the B direction in FIG. 1 (b). A light gray latent image “T” by the convex portion 13 of the sword becomes visible.

  As described above, the case where the forgery prevention structure 10 shown in FIG. 1 is viewed from the A direction and the B direction in FIG. 1B has been described. However, as described above, the convex portions 13 and 14 are parallel to the plane portion 3. Each of the two regions separated by an arbitrary center line is formed such that the areas of the periodic coloration region 11 and the background color region 12 are different from each other, and the protrusion 13 and the protrusion 14 have the same area. Since the magnitude relationship is mutually reversed in the region on the same direction side through the center line, even if the forgery prevention structure 10 is viewed from any direction that makes an acute angle with respect to the plane portion 3, On the convex portion 14, the visible colors are different from each other depending on the color of the background color area 12 and the color of the periodic color arrangement area 11, and the latent image appears to appear due to the difference. Further, as described above, since the size relationship between the background color region 12 and the periodic coloration region 11 on the viewing direction side changes through the center line in each of the convex portions 13 and 14 depending on the viewing direction, the surface area changes. The relationship between the color of the rising latent image and the background changes, and it becomes easier to recognize the latent image.

  When the anti-counterfeit sheet 1 described above is copied, the information printed in the information printing area 4 of the sheet base material 2 and the periodic color arrangement area 11 provided in a matrix by printing on the sheet base material 2 are copied. The convex portions 13 and 14 cannot be reproduced. For this reason, even when the viewing direction of the copy is changed, the latent image formed by the first convex portion group composed of the plurality of convex portions 13 does not appear, thereby enabling authenticity determination. Become. Thus, when performing authenticity determination, in the forgery prevention sheet 1 of this embodiment, when the viewing direction with respect to the forgery prevention sheet 1 is changed from the normal direction of the flat portion 3 of the sheet base material 2 to which direction Even so, since the latent image by the first convex portion group including the plurality of convex portions 13 appears to appear, it is possible to easily determine whether the latent image is true or false without being limited to the viewing direction. Depending on the viewing direction with respect to the anti-counterfeit sheet 1, there may be a case where there is not much difference in color between the convex portion 13 and the convex portion 14 depending on the color of the background color region 12 and the color of the periodic color arrangement region 11. Since the direction is partial, it will not lose its anti-counterfeit function. Moreover, since the convex parts 13 and 14 are formed by denting the plane part 3 of the sheet | seat base material 2, when the sheet base material 2 is seen from the front and back, or when it touches directly, the convex part 13, 14 is difficult to be recognized, and the convex portions 13 and 14 are difficult to reproduce, and the forgery prevention function can be improved.

(Other embodiments)
4A and 4B are diagrams showing an anti-counterfeit sheet according to another embodiment of the anti-counterfeit medium of the present invention. FIG. 4A is a diagram showing the entire configuration, and FIG. 4B is an anti-counterfeit shown in FIG. The figure which shows the detailed structure of the structure 110, (c) is a top view of the convex part 113 shown to (b), (d) is a top view of the convex part 114 shown to (b), (e) is (b) (F) is a perspective view of the convex portion 114 shown in (b) as viewed from the A direction in the drawing.

  In this embodiment, as shown in FIG. 4, a background color region 112 is provided in black in the region that becomes the forgery prevention structure 110 of the sheet base material 102, and the background color region 112 is white as shown in FIG. 1. The only difference is that the periodic color arrangement regions 111 are provided in a matrix. That is, the color of the background color area 112 and the color of the periodic color arrangement area 111 are inverted with respect to those shown in FIG.

  In the anti-counterfeit sheet 101 configured as described above, when viewed from the front, the periodic image area 111 provided in a matrix on the black background color area 112 is recognized as white, and the latent image “T "Is not recognized. And if the visual recognition direction with respect to the forgery prevention sheet | seat 101 is changed from the front to the A direction in FIG.4 (b), for example, the visual recognition side of each of several convex parts 113 and 114, ie, A in FIG.4 (b). Only the side surfaces 113a and 114a and the top portions 113b and 114b are visible. Then, as shown in FIG. 4 (c), in the plurality of convex portions 113, the viewing direction side when separated from the center line perpendicular to the viewing direction when viewed from the A direction in FIG. 4 (b). 4B, the area of the periodic color arrangement region 111 is larger than the area of the background color region 112, and as shown in FIG. Since the area of the background color region 112 is larger than the area of the periodic color arrangement region 111 in the region on the viewing direction side when separated from the center line orthogonal to the viewing direction when viewed from the direction, FIG. As shown in e) and (f), the convex portion 113 and the convex portion 114 have different colors that can be seen depending on the color of the periodic color arrangement region 111 and the color of the background color region 112 on the entire viewing direction side. . Specifically, when the convex portion 113 is viewed from the direction A in FIG. 4B, the area of the periodic color arrangement region 111 made of white is larger than the area of the background color region 112 made of black, so that it becomes light gray. 4B, when the protrusion 114 is viewed from the direction A in FIG. 4B, the area of the background color region 112 made of black is larger than the area of the periodic color arrangement region 111 made of white, so that it looks dark gray. Become. Thereby, as a whole of the anti-counterfeit structure 110, when viewed from the A direction in FIG. 4B, a light gray latent image formed by the plurality of protrusions 113 in a dark gray background formed by the plurality of protrusions 114. “T” appears to appear.

  5A and 5B are diagrams showing an anti-counterfeit sheet as another embodiment of the anti-counterfeit medium of the present invention, wherein FIG. 5A is a diagram showing the entire configuration, and FIG. 5B is an anti-counterfeit shown in FIG. The figure which shows the detailed structure of the structure 210, (c) is a top view of the convex part 213 shown to (b), (d) is a top view of the convex part 214 shown to (b), (e) is (b) (F) is a perspective view of the convex portion 214 shown in FIG. 5 (b) viewed from the A direction in the drawing.

  In this embodiment, as shown in FIG. 5, the size of the periodic coloration region 211 provided in a matrix on the sheet base material 202 is different from that shown in FIG. 1 in that the tops 213 b and 214 b of the convex portions 213 and 214. Only the smaller points are different.

  In the anti-counterfeit sheet 201 configured as described above, when viewed from the front, the periodic color arrangement region 211 provided in a matrix on the white background color region 212 is recognized as black, and the latent image “T "Is not recognized. And if the visual recognition direction with respect to the anti-counterfeit sheet | seat 201 is changed to the A direction in FIG.5 (b) from the front, for example, the visual recognition direction side of each of several convex parts 213,214, ie, A in FIG.5 (b). Only the side surfaces 213a and 214a and the top portions 213b and 214b are visible. Then, as shown in FIG.5 (c), in the some convex part 213, when it isolate | separates by the centerline orthogonal to the visual recognition direction at the time of visual recognition from A direction in FIG.5 (b), it is a visual recognition direction side. 5B, the area of the periodic color arrangement region 211 is larger than the area of the background color region 212, and as shown in FIG. As shown in FIGS. 5 (e) and 5 (f), the region on the viewing direction side when separated from the center line orthogonal to the viewing direction when viewed from the direction includes only the background color region 212. In addition, in the convex portion 213 and the convex portion 214, colors that are visible depending on the color of the periodic color arrangement region 211 and the color of the background color region 212 are different from each other on the entire viewing direction side. Specifically, when the convex portion 213 is viewed from the A direction in FIG. 5B, the area of the periodic color arrangement region 211 made of black is larger than the area of the background color region 212 made of white, so the color becomes dark gray. When the convex portion 214 is viewed from the A direction in FIG. 5B, only the background color region 212 in which the region on the viewing direction side is white via the center line includes a part of the top portion 214b from black. Since this is the periodic color arrangement region 211, it appears light gray. Thereby, as a whole of the anti-counterfeit structure 210, when viewed from the direction A in FIG. 5B, a dark gray latent image formed by the plurality of protrusions 213 in a light gray background formed by the plurality of protrusions 214. “T” appears to appear.

  6A and 6B are diagrams showing an anti-counterfeit sheet according to another embodiment of the anti-counterfeit medium of the present invention, wherein FIG. 6A is a diagram showing the entire configuration, and FIG. 6B is an anti-counterfeit shown in FIG. The figure which shows the detailed structure of the structure 310, (c) is a top view of the convex part 313 shown to (b), (d) is a top view of the convex part 314 shown to (b), (e) is (b) The perspective view seen from the A direction in the figure of the convex part 313 shown to ()), (f) is the perspective view seen from the A direction in the figure of the convex part 314 shown to (b).

  In this embodiment, as shown in FIG. 6, a black background color region 312 is provided in the region of the sheet base material 302 which becomes the forgery prevention structure 310, and the background color region 312 is white. The only difference is that the periodic coloration regions 311 are provided in a matrix. That is, the color of the background color area 312 and the color of the periodic color arrangement area 311 are reversed with respect to those shown in FIG.

  In the anti-counterfeit sheet 301 configured as described above, when viewed from the front, the periodic image area 311 provided in a matrix on the black background color area 312 is recognized only in white and the latent image “T "Is not recognized. And if the visual recognition direction with respect to the forgery prevention sheet 301 is changed from the front to the A direction in FIG. 6B, for example, the visual recognition direction side of each of the plurality of convex portions 313, 314, that is, A in FIG. 6B. Only the side surfaces 313a and 314a and the top portions 313b and 314b on the side become visible. Then, as shown in FIG. 6C, the plurality of convex portions 313 are viewed in the viewing direction when separated from the center line perpendicular to the viewing direction when viewed from the A direction in FIG. 6B. In the region, the area of the periodic coloration region 311 is larger than the area of the background color region 312. Further, as shown in FIG. 6D, the plurality of convex portions 314 have an A in FIG. As shown in FIGS. 6 (e) and 6 (f), the region on the viewing direction side when separated from the center line perpendicular to the viewing direction when viewed from the direction includes only the background color region 312. In addition, in the convex portion 313 and the convex portion 314, colors that are visible depending on the color of the periodic color arrangement region 311 and the color of the background color region 312 are different from each other on the entire viewing direction side. Specifically, when the convex portion 313 is viewed from the A direction in FIG. 6B, the area of the periodic color arrangement region 311 made of white is larger than the area of the background color region 312 made of black, so that it becomes light gray. When the convex portion 314 is viewed from the direction A in FIG. 6B, the region on the viewing direction side includes only the background color region 312 that is black through the center line, and a part of the top portion 314b is white. Since this is the periodic color arrangement region 311, it appears dark gray. Thereby, as a whole of the anti-counterfeit structure 310, when viewed from the direction A in FIG. 6B, a light gray latent image formed by the plurality of convex portions 313 in a dark gray background formed by the plurality of convex portions 314. “T” appears to appear.

  It should be noted that the height of the convex portions 13, 14, 113, 114, 213, 214, 313, and 314 from the flat portions 3, 103, 203, and 303 and the flat portions 3, 103, 203, and 303 in the above-described embodiment. The dimensions of the boundary portion are not limited to those described above, and can be set as appropriate.

  Further, in the convex portions 13, 14, 113, 114, 213, 214, 313, 314, a cylindrical shape or a conical shape without the top portions 13b, 14b, 113b, 114b, 213b, 214b, 313b, 314b, It is also possible to use a dome shape. It is also conceivable that the cross section is rectangular. Further, the sheet base 2 is not limited to being formed by recessing the flat surface portion 3, but may be protruded from the flat surface portion 3 of the sheet base material 2 in the normal direction of the flat surface portion 3.

  In addition, the information that becomes a latent image is not limited to a plurality of convex portions 13, 113, 213, and 313 that form rows and columns as in the above-described “T”, and a plurality of convex portions 13, 113, 213, and the like. 313 may be configured only in rows or only in columns. Moreover, it is not limited to one consisting of a single character, but may be one consisting of a plurality of characters or a pattern. Further, the plurality of convex portions 13, 113, 213, and 313 constituting the first convex portion group that expresses the latent image is divided into a plurality of regions, and characters and the like emerge in each of the plurality of regions. Is also possible. In addition, the plurality of protrusions 14, 114, 214, and 314 that form the second protrusion group include the plurality of protrusions 13 that form the first protrusion group in the background color regions 12, 112, 212, and 312. , 113, 213, 313 are not completely surrounded, but are partially opened so that the plurality of convex portions 14, 114, 214, 314 constituting the second convex portion group The shape surrounding the region where the plurality of convex portions 13, 113, 213, and 313 constituting the first convex portion group are formed may be employed.

  Moreover, in embodiment mentioned above, several convex part 13,113,213,313 which comprises a 1st convex part group, and several convex part 14,114,214 which comprises 2nd convex part group, 314 forms rows and columns in parallel with the arrangement direction of the plurality of periodic color arrangement regions 11, 111, 211, 311, but the plurality of protrusions 13, 113, 213 that form the first protrusion group. , 313 and the plurality of convex portions 14, 114, 214, and 314 constituting the second convex portion group are in the direction of the arrangement direction of the plurality of periodic color arrangement regions 11, 111, 211, and 311. May have a slight angle.

  In the above-described embodiment, the anti-counterfeit sheet 1, 101, 101 in which the anti-counterfeit structure 10, 110, 210, 310 is provided on the sheet base material 2, 102, 202, 302 made of paper is used as the anti-counterfeit medium. The present invention is not limited to such an anti-counterfeit sheet 1, 101, 201, 301, but the present invention is not limited to such an anti-counterfeit sheet 1, 101, 201, 301, but a card substrate formed by laminating a sheet substrate made of a film and a plurality of resin layers. The present invention can also be applied to a material provided with the anti-counterfeit structure 10, 110, 210, 310 as described above.

It is a figure which shows the forgery prevention sheet | seat used as one Embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is a detailed structure of the forgery prevention structure shown to (a). (C) is a sectional view taken along line XX ′ shown in (b), (d) is a plan view of the convex portion shown in (b), and (e) is a plan view of the convex portion shown in (b). The top view, (f) is the perspective view seen from the A direction in the figure of the convex part shown in (b), (g) is the perspective view seen from the A direction in the figure of the convex part shown in (b). . It is a figure for demonstrating an effect | action at the time of visually recognizing the forgery prevention sheet shown in FIG. It is a figure for demonstrating an effect | action at the time of changing the visual recognition direction with respect to the forgery prevention sheet shown in FIG. 1 from the front, (a) is a convex part at the time of visually recognizing from A direction in FIG.1 (b). The figure which shows the state of this, (b) is a figure which shows the state of the convex part at the time of visually recognizing from A direction in FIG.1 (b), (c) is forgery prevention when visually recognizing from A direction in FIG.1 (b). The figure which shows the appearance of the whole structure, (d) is a figure which shows the state of the convex part at the time of visually recognizing from B direction in FIG.1 (b), (e) is when visually recognizing from B direction in FIG.1 (b) The figure which shows the state of the convex part of this, (f) is a figure which shows the appearance of the whole forgery prevention structure at the time of visually recognizing from B direction in FIG.1 (b). It is a figure which shows the forgery prevention sheet | seat which becomes other embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is detailed of the forgery prevention structure shown to (a). The figure which shows a structure, (c) is a top view of the convex part shown in (b), (d) is a top view of the convex part shown in (b), (e) is the convex part shown in (b). The perspective view seen from the A direction in a figure, (f) is the perspective view seen from the A direction in the figure of the convex part shown to (b). It is a figure which shows the forgery prevention sheet | seat which becomes other embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is detailed of the forgery prevention structure shown to (a). The figure which shows a structure, (c) is a top view of the convex part shown in (b), (d) is a top view of the convex part shown in (b), (e) is the convex part shown in (b). The perspective view seen from the A direction in a figure, (f) is the perspective view seen from the A direction in the figure of the convex part shown to (b). It is a figure which shows the forgery prevention sheet | seat which becomes other embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is detailed of the forgery prevention structure shown to (a). The figure which shows a structure, (c) is a top view of the convex part shown in (b), (d) is a top view of the convex part shown in (b), (e) is the convex part shown in (b). The perspective view seen from the A direction in a figure, (f) is the perspective view seen from the A direction in the figure of the convex part shown to (b).

Explanation of symbols

1, 101, 201, 301 Anti-counterfeit sheet 2, 102, 202, 302 Sheet base material 3, 103, 203, 303 Plane portion 4, 104, 204, 304 Information printing area 10, 110, 210, 310 Anti-counterfeit structure 11 , 111, 211, 311 Periodic color arrangement area 12, 112, 212, 312 Background color area 13, 14, 113, 114, 213, 214, 313, 314 Protrusions 13a, 14a, 113a, 114a, 213a, 214a, 313a, 314a Side surface 13b, 14b, 113b, 114b, 213b, 214b, 313b, 314b Top

Claims (4)

A background color region provided on the substrate surface;
A plurality of periodic color arrangement regions having a different color from the background color region, and configured in rows and columns on the background color region and provided at a constant period;
In a predetermined area of the background color area, in parallel with the arrangement direction of the plurality of periodic color regions constitute rows and columns, each of the two regions separated by parallel arbitrary center line to the substrate surface A plurality of first convex portions formed at the constant period so that the areas of the background color area and the periodic color arrangement area are different from each other;
In the background color region other than the predetermined region, a row and a column are formed in parallel with the arrangement direction of the plurality of periodic coloration regions and shifted with respect to the rows and columns of the plurality of first convex portions. The areas of the background color region and the periodic coloration region are different from each other in each of the two regions separated by the center line parallel to the center line, and the size relationship of the areas is the first region. An anti-counterfeit medium having a plurality of second convex portions formed at the predetermined period so as to be reversed with respect to a region on the same direction side through the center line in the convex portion.   In the anti-counterfeit medium according to claim 1,
  The first and second convex portions are anti-counterfeit media having a circular bottom portion.   In the anti-counterfeit medium according to claim 2,
  The background color area and the periodic color arrangement area are anti-counterfeit media each composed of a single color.   In the anti-counterfeit medium according to claim 3,
  The periodic color arrangement region is a forgery prevention medium having a circular shape.

Images