JP6112358B2 - Pattern forming body - Google Patents

Description

  In the field of valuable printed matter such as banknotes, passports, securities, identification cards, cards, and passports that require anti-counterfeiting effects, the present invention provides a primary authentication technique that can be determined by the human senses and authenticity by machine reading. The present invention relates to a pattern forming body having both tertiary authentication techniques for performing false discrimination.

  Various anti-counterfeiting techniques have been adopted for printed matter having a value such as banknotes and securities, or printed matter certifying the holder such as a passport or ID card in order to prevent forgery or alteration. Anti-counterfeiting technology is largely classified into primary authentication technology that can determine authenticity based on the human senses, secondary authentication technology in which a person determines authenticity using a simple determination device, and tertiary authentication technology in which a machine determines authenticity. Can be separated.

  The primary authentication technology not only depends on the material specialities (for example, printing with ink containing a volatile pigment) and the manufacturing specialities (for example, paper making), but also gives the pattern to be applied. By devising, more advanced anti-counterfeiting technology can be configured. There are many techniques for using anti-counterfeiting techniques that have been developed in this way to use patterns using lines. For example, there is a technique in which a latent image can be visually recognized according to an observation angle by changing the arrangement angle of the lines of raised intaglio printing and arranging it as a latent image portion and a background portion (see, for example, Patent Document 1). ).

  In addition to providing a line pattern by printing in this way, a colored line image line is laminated at a constant interval on a substrate having a concavo-convex shape consisting of a line pattern or a relief pattern, and a latent image is formed. There are some which give a line pattern to a substrate like the technique which did (for example, refer to patent documents 2). In addition, the primary authentication technique using such a line is not limited to printed matter. A technology that shows a latent image when tilted using a line is also applied to a 500-yen coin manufactured by the Mint.

  By the way, today, the printed matter to which the above-described anti-counterfeiting technology is applied is often processed by a machine, and a machine reading element that is tertiary authentication is very important. As the most familiar one, vending machines that handle banknotes machine-read banknotes, and the machine determines the authenticity and the type of ticket. In addition, information on the banknote of the country from the banknote, and information on the issue date, issue location, production time, production factory, production machine, etc., to be useful for the post-distribution management on the issuer side. You may want to grant. As a technique for giving information to a printed matter, there is a one-dimensional code such as a JAN code or a two-dimensional code such as a QR code (registered trademark). These are technologies developed for the purpose of giving information, and have the advantage that the read result is accurate and the amount of information that can be given is large.

  There is a technique for retaining a certain amount of information in a security thread or a stripe-shaped hologram, which is a primary authentication technique (see, for example, Patent Document 3). This is a technique for providing information to the primary authentication technique indicating authenticity by the presence of a security thread.

  Specifically, a bar code representing a code word selected from codes suitable for a security thread or the like is given in advance and inserted into a paper sheet as a base material. Since the security thread is inserted into the paper and cut together with the paper, there is a situation where the synchronization of the barcode position and the paper position cannot be guaranteed. If there is, a code designed to represent the same information is used no matter where it is read, and a code that can correct some reading errors can be formed. Even if there is a problem in reading partially, it is a technology that can correct it and give a correct result.

  In addition, by changing the interval of the dividing lines for the geometric patterns such as the tint block, the stencil pattern, and the relief pattern attached to banknotes, etc., the printed matter in which the information is embedded is Fourier-transformed, and the dividing lines There is a printed material in which the correlation between the arrangement intervals is extracted as the peak intensity of the Fourier transform pattern to enable authenticity determination (see, for example, Patent Document 4). The technique of embedding in printed matter so that information can be extracted by frequency analysis such as Fourier transform is not limited to the print pattern to which information is embedded, and has the advantage that authenticity can be determined by having certain characteristics in frequency. .

JP-B 56-19273 Japanese Patent No. 2615401 Japanese Patent No. 5158598 Japanese Patent No. 4082448

  However, for the techniques of Patent Documents 1, 2, and 4 described above, a line is used for the configuration, and it is difficult to give information to the primary authentication technique using this line. This is because in order to make it visually invisible, it is necessary to apply an information pattern in a fine manner, and it is limited to a printing method capable of providing a thin image line, and corresponds to a primary authentication technique using various lines. There was a problem that it was not possible.

  Further, the technique of Patent Document 3 is an information providing method specialized in a security thread or the like even though it is a primary authentication technique, and cannot be applied to the primary authentication technique using the above-described line.

  Furthermore, the technique of Patent Document 4 does not show an effective method for determining which information of a plurality of pieces of information is embedded from the obtained Fourier transform pattern, and considered practical use. In some cases, it is difficult to secure the amount of information.

  The reason why it is difficult to use a two-dimensional code or the like for printed matter that requires a technology for preventing forgery of gift certificates is because the gift certificate does not have a sufficient area for printing the two-dimensional code. In order to design a gift certificate so that it is difficult to forge, it is necessary to arrange not only one forgery prevention technology but also a plurality of forgery prevention technologies in a limited area. This is because even if the anti-counterfeiting technology is difficult to counterfeit, the forgery will be targeted by counterfeiters, and the anti-counterfeiting technology will eventually become fragile by detailed analysis of the forgery. Because it becomes.

  In order to prevent counterfeiters from squeezing counterfeit turrets, it is common to place multiple anti-counterfeiting technologies as much as possible. For this reason, it is considered difficult to secure the area of the two-dimensional code. Even if the area can be secured, there is a problem that the machine for true / false discrimination can be easily lost by simply printing the two-dimensional code. As a countermeasure, a method of printing a two-dimensional code with ink that is usually invisible but can be read by a special device in the same area as the primary authentication technology (for example, a method of printing a two-dimensional code with fluorescent ink) is considered. It is done. However, there has been a problem in that it is necessary to increase the number of manufacturing processes or quality control items.

  The present invention has been made in view of such circumstances, and uses elements constituting the primary authentication technology using a single line, so that a predetermined amount of information (third order) is not visually affected. It is an object of the present invention to provide a pattern forming body in which authentication technology is newly embedded.

  In the present invention, in at least a partial region of the base material, a line formed by any of ink, metal vapor deposition film, base material unevenness, or transparent, has a phase, an arrangement direction of image lines, a gloss, A line is formed in a pattern forming body that has a latent image portion and a background portion that are divided by either a reflection amount or a transmission amount and that allows the latent image to be visually recognized under a predetermined observation condition. At least one image line or non-image area has ink presence / absence, thick / thin, dark / light, color difference, metal deposition film presence / absence, thick / thin, or unevenness of substrate Alternatively, a plurality of cells that are binary-encoded according to either light / dark differences due to clearing are arranged, and at least one drawing line or non-drawing part has a pattern in which cells are arranged corresponding to information. It is a pattern formation body characterized by having at least one.

  The pattern forming body of the present invention is characterized in that at least one image line or non-image area has two or more patterns.

  The pattern forming body of the present invention is characterized in that two or more image lines and / or non-image areas have at least one pattern.

  The pattern forming body of the present invention is characterized in that two or more image lines and / or non-image areas have two or more patterns, respectively.

  The pattern forming body of the present invention is characterized in that two or more image lines and / or non-image areas are arranged by shifting the pattern in the direction of the image line.

  In the pattern formed body of the present invention, various primary authentication technologies using a line are used to construct a certain amount of information as a tertiary authentication technology without using a component that constitutes a visual effect. It is possible to provide both authenticity determination by visual inspection at a window and appraisal authenticity determination by machine reading.

It is a figure which shows an example of the pattern formation body in this invention. It is a figure which shows an example for demonstrating the pattern formation area in this invention. It is a partial enlarged view of a pattern formation area. It is a figure which shows the example (no ink) of a cell. It is a figure which shows another example (with ink) of a cell. It is a figure which shows another example (with / without ink) of a cell. It is a figure which shows another example (ink density / lightness, presence / absence of a metal vapor deposition film) of a cell. It is a figure which shows another example (concave / convex of a base material) of a cell. It is a figure which shows the example of the primary authentication technique using pearl ink. It is a figure which shows the example of the primary authentication technique using metallic ink. It is a figure which shows the example of the primary authentication technique using a metal vapor deposition film. It is a figure which shows the example of the primary authentication technique using the unevenness | corrugation of a base material. It is a figure explaining arrangement | positioning of a cell. It is a figure explaining the arrangement which is not desirable about arrangement of a cell.

  FIG. 1 is a diagram showing an example of a pattern forming body (1) in the present invention. As shown in FIG. 1, the pattern forming body (1) has a pattern forming region (3) in which the pattern forming body of the present invention is formed on at least a part of the substrate (2). As shown in FIG. 1, in areas other than the pattern formation area (3), necessary information such as fees, characters, and other patterns are obtained by a known printing method (for example, offset printing, intaglio printing, etc.). It may be given.

  As the base material (2) in the present invention, paper such as high-quality paper, coated paper, art paper, films, plastics, and the like can be used, and lines formed in the pattern formation region (3) described later are formed. If possible, there is no particular limitation.

  2 is an enlarged view of the pattern formation region (3) in FIG. 1, FIG. 2 (a) is a schematic view thereof, and FIG. 2 (b) is an observation of appearance of a latent image pattern (4). It is a schematic diagram which shows a state.

  In the pattern formation region (3) of FIG. 2 (a), at least a line (5) is arranged, and the phase, arrangement direction, gloss, reflection amount of each image line (6) constituting the line (5). Alternatively, it has a latent image portion (7) and a background portion (8) divided by any difference in the amount of transmitted light. In the present invention, the line (5) refers to a state in which a plurality of individual image lines (6) are arranged with the same regularity.

  FIG. 2B shows a primary image in which the latent image pattern (4) formed in the pattern formation region (3) shown in FIG. 2 (a) appears by changing the observation angle using the uneven shape. In the case of an authentication technique, it is a figure which shows the state in which a base material is inclined and the latent image pattern (4) is visually recognized.

  In the example of FIG. 2 (a), the present invention provides the third authentication technique by machine reading using the elements constituting the first authentication technique for authenticity determination by the five human senses. The element constituting the technology is the drawing line (6). In addition, the latent image pattern (4) is formed by changing the arrangement direction of a part of the line (5) using the image line (6), and the image line (6) is raised by intaglio printing, for example. It is formed to have.

  However, as described above, the present invention is not limited to this example, and the elements constituting the latent image pattern (4) are all lines (5), and the authenticity determination is performed using the primary authentication technique. That's fine. An example of the primary authentication technique targeted by the present invention will be described later. The common configuration and principle of the present invention will be described below based on the example shown in FIG.

  In the example of FIG. 2, the width of the image line (6) is appropriately set in the range of 200 to 300 μm, and the pitch is formed in the range of 300 to 1000 μm. Therefore, it goes without saying that it is a fine line. In the present invention, predetermined information can be embedded in such a fine line.

  The information embedded in the example of FIG. 2 will be described in more detail. FIG. 3A is an enlarged view enclosed by a dotted line in FIG. The image line (6) formed in the latent image forming area (3) is different in the width of a part of the image line (6). Predetermined information is embedded by the difference in the line width. The embedding of information using the image line width is an example, and as described above, there are various other types of information embedding modes as will be described later.

  Reference numerals 101 and 102 shown in FIG. 3A represent embedding information expressed by a plurality of bits depending on the width of the image line in the horizontal direction of the image line (6). The thin line of the image line (6) represents “0”, the thick line of the image line (6) represents “1”, 101 represents the bit string “0000111”, and 102 represents the bit string “1000011”. An area representing 1 bit equivalent of “0” or “1” is called a cell (S).

  FIG. 3B for explaining the cell (S) is an enlarged view of a single dotted line (6) in FIG. In the present example, it has been described that when embedding information in the image line (6), the image line width is thick, but as shown in FIG. A cell (S) of “1” is arranged, and a cell (S) of “0” is arranged in a thin area of the image line (6). In addition, in order to suggest that a plurality of “0” cells (S) are arranged in the narrow portion of the image line (6), the cells (S) are represented by dotted lines. , “0” cells (S) are not arranged by dotted lines.

  These bit sequences have a cyclic permutation relationship with each other, and are bit sequences belonging to the same cyclic equivalence class (for “cyclic permutation” and “cyclic equivalence class”, refer to Patent Document 3 or “Code Theory”, Miyagawa, Iwadare, Akihiro Imai (See Do (1973)). In the present invention, bit strings belonging to these same cyclic equivalence classes are handled as the same information. Bit strings belonging to the same cyclic equivalence classes are “1100001”, “1110000”, “0111000”, “0011100”, and “0001110”. The bit string in which a plurality of cells (S) are arranged is arranged as a pattern corresponding to information to be embedded, and the same pattern or a different pattern corresponding to this information is formed in the pattern formation region (3).

  The number of “1” in the bit string is called a weight. For example, the weight of “1011” is 3, and the weight of “0100” is 1.

  When placing a cell (S) representing a bit string in the image area, a bit string having a large weight is preferably selected, and when placing a cell (S) representing a bit string in the non-image area, preferably a weight is selected. Select a bit string with small. This is because if a cell (S) column representing a bit string having a small weight is arranged in the image line part, it is difficult to distinguish from the non-line part, and a cell (S) string representing a bit string having a large weight is arranged in the non-image part. This is because it is difficult to distinguish from the image portion. Further, when cell (S) columns are arranged in both the image line portion and the non-image line portion as in the example of FIG. 6, it is difficult to distinguish the image line portion from the non-image line portion.

  Further, two or more bit string patterns corresponding to the information to be embedded may be formed in one image line or non-image area. For example, in FIG. 3A, two patterns are arranged on one drawing line. In this case, if there is a plurality of image lines or non-image areas, embedding information by limiting to one line increases the concealment because the information is inconspicuous, and then gives two or more information. It will be possible.

  Further, two or more image lines or non-image line portions or both may be used, but one pattern may be formed for each of a plurality of image lines or non-image line portions. Specifically, a pattern is formed for each image line (6) arranged in a plurality in the arrangement direction (X). For example, in FIG. 3A, only the left half is considered. (The right half is not considered). One pattern is formed on each of the plurality of image lines (6). In this case, since each one is formed in a different image line or non-image area, a plurality of pieces of information can be embedded while arranging inconspicuously while considering the design.

  Further, two or more image lines and / or non-image area portions may be used, but two or more patterns may be formed for each of the plurality of image lines or non-image area portions. For example, it is the whole as shown in FIG. 3A, and further has a form as shown in FIG. In this case, particularly as shown in FIG. 13, since it is formed as a whole, there is an advantage that information is recognized as one pattern rather than being embedded.

  As a specific method of embedding information in the image line (6), the thickness of the image line has been described. Hereinafter, other embodiments of the present invention will be sequentially described.

  First, it is possible to embed information depending on the presence or absence of ink constituting the image line (6). In order to represent bits “1” and “0” by printing, in the image line (6), a cell (S) with ink is set to “1” and a cell without ink (S) is set to “0”. You can also. As an example, FIG. 4 shows a diagram representing “1011” depending on the presence / absence of ink in the image line (6). Three cells (S) (302) indicating “1” are printed on the substrate (2). There is an unprinted cell (S) between the leftmost cell (S) 302 and the second cell (S) 302 from the left. This is the cell (S) indicating “0”. The presence / absence of ink in the image line (6) is considered to be one form of the image in the image line (6), if the thin part in the image line (6) is thinned to the limit. You can also.

  As another form, there is a method in which presence / absence of ink is formed in a non-image area between adjacent image lines (6). FIG. 5 is a diagram showing “0100” depending on the presence / absence of ink in the non-image portion of the line (5). One cell (S) 302 indicating “1” is printed between two image lines (6). “0100” is represented by providing one unprinted cell (S) on the left side and two on the right side.

  4 and 5 show examples in which cells (S) representing bits are arranged in the image line portion or the non-image line portion, respectively, it is also possible to arrange cells in both of them. FIG. 6 shows an example thereof. The uppermost part of FIG. 6 indicates “1011” depending on the presence / absence of ink in the image area, “0100” for the non-image area, and “0100” in the lower area for the image area. 1101 ". Both “1011” and “1101” belong to the same cyclic equivalence class, and are bit strings representing the same information in the present invention.

  Further, as shown in FIG. 7 (a), in the image line (6) formed by the printing ink, as described above, the image density (rather than the thickness / thinness of the image line (6) and presence / absence of ink) The cells (S) may be formed by dark / light. In this case, it is possible to express the darkness / lightness of the printing density by using one color ink and changing the ink film thickness. Furthermore, as shown in FIG. 7B, the cell (S) may be formed by the difference in the color of the ink. However, depending on the color used, if the color of the “1” cell (S) and the “0” cell is an extreme color difference (for example, a complementary color relationship), the original primary authentication technology may be hindered. Since there is a possibility that the information is embedded, the color difference is such that the cell (S) can be differentiated by machine reading, and the primary authentication technique is not hindered. It is preferable that

  The above-described line (5) was formed by applying ink by printing. However, instead of the printing method, the metal line (5) may be formed by attaching a metal vapor deposition film. Even in the case of using a metal vapor deposition film, the cell with the presence / absence of the metal vapor deposition film and the line thickness (6) of the metal vapor deposition film as well as the presence / absence of the ink vapor and the image line (6). (S) can be formed. Specifically, the description is omitted because it is similar to the formation by ink.

  As for the image line (6), as shown in FIG. 8, it is also possible to arrange the cells (S) by making the substrate itself uneven. FIG. 8A shows a situation where the substrate (2) is observed from directly above, and the image line (6) appears to be formed by a single line. In addition, in order to show that it is comprised with several cells (S), it has divided with the dotted line, but there is actually no dotted line. FIG. 8B is a sectional view taken along the line A-A ′ of FIG. As shown in FIG.8 (b), a part of base material (2) is dented and thickness differs. A cell (S) is arranged by the unevenness, and a cell (S) 302 indicating a convex portion “1” is provided at one location on the left side and two locations on the right side, and a cell indicating a concave portion “0” therebetween. (S) is arranged.

  About the formation method of the uneven | corrugated shape to this base material (2) itself, it can form by embossing and quenching.

  The cell (S) is formed not only by the formation of the cell (S) by the uneven shape of the base material (2) but also by the difference (bright / dark) in the amount of transmitted light with respect to the base material (2). (S) is also possible. In the concavo-convex shape by embossing, when the base material (2) is paper, some of the fibers of the paper already produced are condensed to form a dent, and there is a difference in the amount of fiber from other places. Absent. Therefore, even if observed under transmitted light, no difference (bright / dark) in transmitted light amount occurs. However, with respect to the concave and convex shape formed by squeezing, since the image line (6) is formed by changing the fiber amount in the paper manufacturing stage, the concave portion due to white watermark is more fiber than other parts. The amount is reduced, and the convex portion due to the black watermark has a larger fiber amount than other portions, and a difference in transmitted light amount (bright / dark) naturally occurs.

  As described above, various forms of the binary encoded cell (S) for embedding information in the present invention have been described. As described above, the present invention is a primary authentication technique using the line (5). Since the third authentication technique can also be provided by granting to the above, an example of the primary authentication technique that can be given next will be described.

  As described above, the present invention can be applied to the primary authentication technology that forms the line (5) with ink using a printing method. However, with regard to the type of ink, the embedded information is machine-read. Therefore, an ink having a color that is transparent or translucent, and that is the same color as the base material (2) is not preferable. This is because it is difficult to differentiate the line (5) from the base material (2) in the reading machine, and the reading cannot be performed. Except for this undesirable color, other colored inks can be used, and may be pearl ink or metallic ink.

  As a primary authentication technique using pearl ink, there is, for example, Japanese Patent No. 4742372, which has already been filed by the present applicant. As shown in FIG. 9, this technique uses a plurality of image lines (6) printed so as to have a bulge with a translucent ink having a specular gloss or a translucent ink containing a pigment having a planar orientation. This image line (6) is divided into a latent image portion (7) and a background portion (8) by making the arrangement direction different, and when it is observed in accordance with the arrangement direction of the image line, This is an authenticity printed matter in which the image portion (7) and the background portion (8) have a difference in the amount of reflected light, and the latent image portion (7) and the background portion (8) are separated so that the message can be confirmed.

  As described above, Japanese Patent No. 4742372 has a configuration in which a plurality of lines is arranged, and the latent image portion (7) and the background portion (8) are formed by changing the observation angle of the cell (S). This is a primary authentication technique that determines authenticity based on messages that appear after being classified. Therefore, the information of the present invention as described above can be embedded in the plurality of image lines (6). What image configuration is used to embed information in the image line may be appropriately designed on the assumption that the configuration does not reduce the effect of the primary authentication technique.

  Further, as a primary authentication technique using metallic ink, there is, for example, Japanese Patent Application Laid-Open No. 2012-232545 already filed by the present applicant. As shown in FIG. 10, this technique is transparent on at least a part of a glossy substrate on a first image formed with ink of a color different from that of the substrate containing the glittering material. A first background comprising a printed image formed with a second image formed of ink, the first image having a plurality of first background lines (6-z) arranged in a predetermined direction at a predetermined pitch; Part (8-1) and a first information (latent image) part (7-1) in which a plurality of first information lines (6-y) are arranged in a predetermined direction at a predetermined pitch, One background image line (6-z) and the first information image line (6-y) are arranged adjacent to each other or close to each other, and the second image has a predetermined positive image line (6-p). A plurality of positive image lines arranged in a predetermined direction at a pitch, and a negative image line group formed by arranging a plurality of negative image lines (6-n) in a predetermined direction at a predetermined pitch, The di line (6-p) and the negative line (6-n) have different phases in a predetermined direction, and the positive line group and the negative line group are formed with the same line area ratio. A second background image (8-2) and a second information image formed by being arranged adjacent to or close to the positive image (6-p) and / or the negative image (6-n). A plurality of second information (latent image) portions (7-2) arranged in a predetermined direction at a pitch, and a positive image line (6-p) or a negative image line (6- 6-n) is an anti-counterfeit printed matter in which an image changes at three different observation angles under the intensity of diffusely reflected light or the intensity of specularly reflected light by overlapping one another.

  In Japanese Patent Laid-Open No. 2012-232545, both the first image and the second image are configured by arranging a plurality of image lines (6), and three different images appearing by changing the observation angle are disclosed. This is a primary authentication technique for determining authenticity by changing and visually recognizing. Therefore, the information of the present invention as described above can be embedded in the plurality of image lines (6).

  Further, as described above, it is possible to embed information not only for the formation of the image line by the printing ink but also for the image line having the metal vapor deposition film. For example, there is Japanese Patent Application Laid-Open No. 2012-45742 filed by the present applicant. As shown in FIG. 11, this technique has a latent image pattern region in which a light-reflective light-reflective layer is formed on at least a part of a substrate, and at least a part of the light-reflective layer has a light-reflective layer. The fine elements (6) formed by the absence of a part of the layer are arranged in a line, and the plurality of fine elements (6) arranged in a line form are a plurality of elements in which at least one end is interrupted. Latent image pattern elements (6-x), and the plurality of latent image pattern elements (6-x) include a first end (6-x-1) having one end cut off and one end. It has at least one of the second ends (6-x-2) where the other different ends are interrupted, and in the plurality of latent image pattern elements (6-x), different latent image pattern elements (6- The transmission latent image pattern is formed by the overlapping region of the first end portion (6-x-1) and the second end portion (6-x-2) in x). When observed under overlapping region and difference occurs between the amount of light transmitted through the other areas, the formation of anti-counterfeit a latent image pattern can be visually recognized.

  Japanese Patent Application Laid-Open No. 2012-45742 is configured by arranging fine lines (5) formed by the absence of the light reflecting layer in part of the light reflecting layer, and only under transmitted light. This is a primary authentication technique for determining authenticity by allowing an image that appears to be visible. Therefore, the information of the present invention as described above can be embedded in a line formed by removing a part of the light reflecting layer.

  Furthermore, it is possible to embed information in the present invention also for a technique using an image line formed by processing a base material itself constituting a printed matter. For example, there is JP-A-2009-23183 filed by the present applicant. In this technique, as shown in FIG. 12, a gradation image formed by arranging a plurality of concave image lines (6) having a relief pattern regularly arranged on a light-transmitting substrate is formed, and a relief is formed. The height of the pattern is changed in n steps (n is an integer of 2 or more) for each density corresponding to the original image, and is regularly formed between the concave image lines (6) having a relief pattern. As a result of the formation of the concave image line (6) arranged in the forgery, it is a forgery-preventing formation that can be visually recognized by appearing a gradation image when the observation angle is changed.

  In JP 2009-23183, the light-transmitting base material itself is subjected to processing for removing a part of the base material by laser processing or the like and arranging fine lines (5), and the observation angle is set. This is a primary authentication technique for determining authenticity by allowing an image appearing when changed to be visually recognized. Therefore, the information of the present invention as described above can be embedded in the line (5) formed by removing a part of the base material.

  As described above, it has been explained that the present invention can be implemented in various forms in the primary authentication technology using the line (5) excluding colorless and transparent or the same color as the base material. Then, a configuration in which the present invention cannot be implemented will be described even with a transparent line or a line (5) excluding a color of the same color as the base material.

  In the present invention, the image line (6) in which information is embedded is limited to a straight line. This is because the embedded information can be detected only in a certain direction in the field of machine reading technology. In order to detect by changing the direction, it is necessary to change the direction of the medium to be read once. Therefore, the present invention is also the same, and even if the technique using the line (5) is used, it cannot be applied to the curved line in which a plurality of curved lines are arranged. Therefore, it cannot be adopted as an image appearance technique (primary authentication technique) by changing the observation angle using a wavy line, circle, or ellipse.

  In the present invention, in order to embed information in a plurality of image lines (6), the presence / absence of ink in the image line (6) and the cell (S) formed by the thickness / thinness of the image line (6) are different from each other. It is preferable that the line (6), particularly the adjacent image lines (6), be arranged at a location that does not overlap.

  FIG. 13 shows a specific arrangement of cells (S). FIG. 13 shows a pattern formation region (3) in the pattern formation body (1) using convex lines using the intaglio printing method. A background portion (8) in which the image line (6) is arranged in a line in the horizontal direction, and a latent image portion in which characters "NPB" are formed by arranging in a line in the center in the vertical direction (7). Even if this pattern formation region (3) is observed with respect to the substrate (2) from directly above, only a uniform line pattern is visible, but when the observation angle is tilted in the horizontal direction or the vertical direction, “NPB "Is visible as a latent image pattern (4).

  Information is embedded in the line (5) formed in the pattern formation region (3), and the cell (S) is formed by the width / thickness of each image line (6). . In FIG. 13 (a), the thickness / thinness of the image line (6) can be confirmed, but this is suggested for the purpose of explanation, and the actual image line (6). Since the width of the image is about 200 to 300 μm, the thickness / thinness of the image line (6) cannot be visually recognized.

  FIG. 13B is an enlarged view of a portion surrounded by a dotted line in FIG. As shown in FIG. 13B, in the image line (6) arranged in a line, cells (S) for embedding information are formed with thick / thin image line width. This cell (S) is not arranged corresponding to the same position at least between the adjacent image lines (6).

In the present invention, “cell (S) is not arranged corresponding to the same position”, conversely, “cell (S) is arranged corresponding to the same position” using FIG. Will be described. As shown in FIG. 14, the cell (S) formed in the image line (6) also has the same region (X) in the image line (6) with respect to the arrangement direction (X) of the image line (6). The region (Q ₂ ) that is arranged in Q ₁ , Q ₃ ) and in which the cell (S) is not arranged is also arranged corresponding to the same position. In this way, the arrangement in the same region with respect to the arrangement direction (X) of the image line (6) is regarded as “the cell (S) is arranged corresponding to the same position”, and this is not the case. The arrangement, that is, the arrangement as shown in FIG. 13 indicates that “the cells (S) are not arranged corresponding to the same position”.

In this way, the reason why the cells (S) are not arranged corresponding to the same position is that if the cells (S) are arranged corresponding to the same position, as shown in FIG. In the area where Q is arranged (Q ₁ , Q ₃ ) and the area where the narrow part of the image line (6) is arranged (Q ₂ ), the density is different in the unit area, and the original image is uncomfortable. Because it becomes. Furthermore, there is a problem that the presence / absence of the thick / thin line (6) becomes clear and it is possible to grasp that the information is embedded.

  As described above, the present invention includes primary authentication technologies using all lines (5) including technologies that already exist and technologies that will be created in the future (excluding technologies that use curved and transparent colored lines). Since it can be used, it is preferable not to arrange the cells (S) in correspondence with the same position in order to prevent the original primary authentication technique from being hindered.

  In addition, when reading the printed matter with the embedded information in the present invention by a machine for authenticity determination, the reading method described in Japanese Patent Application Laid-Open No. 2010-39697 already filed by the present applicant is used. Good.

1 pattern formed body 2 substrate 3 pattern formation region 4 latent image pattern 50,000 line 6 streaked 7 latent image portion 8 background portion S cell X arrangement direction _{Q 1,} Q 2, _{Q 3} corresponding regions

Claims (5)

A line formed by at least a part of the base material by ink, metal vapor deposition film, unevenness of the base material, or transparent, phase, orientation direction of the image line, presence or absence of the image line, In a pattern forming body having a latent image portion and a background portion divided by any difference in color difference, gloss, reflected light amount, or transmitted light amount, and the latent image can be visually recognized under predetermined observation conditions,
The presence / absence of the ink, thick / thin, dark / light, color difference, or presence / absence of the metal deposition film, thick / Or a plurality of cells that are binary-encoded by either the unevenness of the base material or the difference in brightness / darkness due to sheering,
At least one of the drawing line or the non-drawing part has at least one pattern in which the cells are arranged corresponding to information. The pattern forming body according to claim 1, wherein at least one of the image lines or the non-image area has two or more of the patterns. The pattern forming body according to claim 1, wherein two or more of the image lines and / or the non-image area have at least one pattern. 2. The pattern forming body according to claim 1, wherein two or more of the image lines and / or the non-image area portions each include two or more of the patterns. 5. The pattern forming body according to claim 3, wherein two or more of the image lines and / or the non-image area are arranged such that the pattern is shifted with respect to the arrangement direction of the image lines.

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