Latent image formation body

Abstract

To provide a latent image formation body which is not affected by a use direction of a discrimination tool, and has a latent image which has excellent design properties and can express a moving image effect.SOLUTION: There is provided a latent image formation body which has a first combined latent image element group formed by combining multiple first latent image element groups which are formed by regularly arranging first latent image elements having different shapes and being formed by division compression or compression by a first rule, of multiple first contour base images which are formed on at least a part of a substrate and indicate a contour of a first base image which is formed by rotating in a prescribed rotation direction and along a prescribed angle with respect to a center point of the first base image, so that the respective latent image elements do not overlap each other with the center points of the first latent image element groups as reference.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a latent image forming body that enables a latent image having a moving image effect to be viewed when observed under reflected light or transmitted light with a discriminating device such as a lenticular lens or a line sheet superimposed thereon in the field of valuable printed matter (hereinafter referred to as "valuable printed matter") such as banknotes, passports, securities, identification cards, and travel tickets that require anti-counterfeiting effects. [Background technology]

[0002] With the recent advances in digital devices such as scanners, printers, and color copiers, it has become easy to create elaborate copies of valuable printed materials. Therefore, in order to prevent copying and counterfeiting using the digital devices mentioned above, various counterfeit prevention technologies that cannot be reproduced by printers or copiers are required.

[0003] One of these counterfeit prevention technologies is a watermark pattern formed by a "perforation technique" in which a papermaking machine uses a roll member with an uneven shape formed in it to form thicknesses in the paper during the paper manufacturing process, using a papermaking machine's circular screen or dandy roll. When observed under transmitted light, the watermark pattern formed by the circular screen or dandy roll appears bright due to the high amount of light transmitted through the relatively thin parts of the paper, and appears dark due to the low amount of light transmitted through the relatively thick parts of the paper, allowing the watermark pattern to be seen as a whole.

[0004] Also, unlike the composition based on the density or thickness of a base material such as paper, there are techniques for forming watermark patterns by printing techniques. For example, watermark techniques that use watermark ink that penetrates a base material such as paper to increase light transmittance, and watermark techniques that use light-shielding ink on a base material such as paper to decrease light transmittance are known.

[0005] In this specification, the technology of applying a watermark pattern to paper using a papermaking machine is referred to as "watermarking technology," and the technology of applying a watermark pattern using ink and the technology of applying a watermark pattern by cutting paper with laser processing are referred to as "watermarking technology," and all of these are collectively referred to as "watermarking technology."

[0006] These watermarking techniques do not affect the other designs of the valuable print because the watermark cannot be seen under normal reflected light. On the other hand, as long as a certain amount of light is present, the watermark can be seen in any environment to determine authenticity. These techniques are also extremely well-known and are therefore widely used in the field of valuable prints.

[0007] In addition, a latent image is formed on a substrate, and the latent image is composed of an array of latent image elements which have the same color as the substrate but different light transmittance under reflected light, and are formed by dividing and / or compressing an original image. A discrimination device corresponding to the latent image elements is formed on the latent image or in a position superimposed on the latent image on the other side of the substrate, whereby the latent image is invisible under reflected light, and the image changes and is visible when the observation angle is changed under transmitted light (see, for example, Patent Document 1).

[0008] In addition, a latent image print has been disclosed in which a color layer having multiple colors, a group of shiny kamaboko-shaped elements formed regularly at a specified pitch, and a group of latent image elements formed by dividing or dividing and compressing an image consisting of the contour lines of a base image are layered on a substrate, in which a color image formed by combining the group of latent image elements and the color layer is dynamically visible depending on the observation angle (see, for example, Patent Document 2).

[0009] Also disclosed is an anti-counterfeiting printed matter, which is characterized in that image elements having a first image line and a second image line arranged opposite each other across the center, and a third image line and a fourth image line arranged opposite each other across the center along a second direction perpendicular to the first direction, are arranged in a matrix pattern at a constant pitch on a substrate, and an image in a negative-positive relationship is visible depending on the angle at which a distinguishing tool is positioned (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent No. 6966747 [Patent Document 2] Patent No. 7089250 [Patent Document 3] Patent No. 4635160 Summary of the Invention [Problem to be solved by the invention]

[0011] However, in the technology of Patent Document 1, as shown in FIG. 1, a latent image element group (b-1) is formed by arranging a plurality of latent image elements (b-1-1) obtained by dividing or dividing and compressing a solid image of a base image (β1) by a certain width (W1) in a first direction (S1) at a certain pitch (P1), and similarly, as shown in FIG. 1(b), two or more base images (β2 to βn) (not shown) having different arrangement angles of the base image (β1) are similarly divided or divided and compressed to obtain latent image element groups (b-2 to b-n) to form a latent image (B1) by combining the latent image element groups (b-2 to b-n) based on the center point (O) of each image as a reference. When observed without using a discrimination tool, it is difficult to recognize it as a design and has poor design, so there is a problem that it is difficult to create a design that blends with other designs.

[0012] Furthermore, as shown in FIG. 2(a), when a discriminator (5) such as a line filter or lenticular lens having a transparent filter with multiple straight lines formed in one direction is superimposed on the latent image (B1) at a predetermined angle (defined as 0 degrees) in a first direction (S1), a latent image (Ba) can be observed. However, when the discriminator (5) is superimposed in a second direction (S2) that is at an angle of 90 degrees to the predetermined angle, only an observation image (Bb) can be observed. Since the angle at which the discriminator can be placed at the latent image is limited to a specific angle (the direction in which the latent image appears is limited to one direction), there is a problem that if the discriminator (5) is used in the wrong direction, the latent image will not appear.

[0013] In addition, while the technology of Patent Document 2 is capable of imparting rich colors with multiple different hues, when the latent image is observed without using the discrimination device, the image seen by the observer is meaningless information, making it difficult to recognize as a design and inferior in design quality, which makes it difficult to blend the image with other designs.

[0014] In addition, the technology of Patent Document 3 can form an invisible image that can be clearly expressed by a single discriminator, and the latent image changes when the angle of the discriminator is changed, but there is a problem in that the latent image does not express a moving image effect.

[0015] The present inventor aims to solve the above-mentioned problems and provides a latent image forming body that is not affected by the direction in which the discriminating tool is used, has excellent designability, and has a latent image that can produce a moving image effect. [Means for solving the problem]

[0016] The present invention is a latent image forming body having a first composite latent image element group in which a 1-1 contour base image, a 1-2 contour base image, ..., a 1-n contour base image (n is an integer of 2 or more) are formed on at least a part of a substrate using a plurality of latent image elements divided and compressed or divided in a first direction, and the 1-1 latent image element group, the 1-2 latent image element group, ..., and the 1-n latent image element group are regularly and sequentially arranged without overlapping with each other, and the 1-1 contour base image, the 1-2 contour base image, ..., and the 1-n contour base image are formed as a geometric pattern by gradually changing at least one of the position and shape of the 1-1 contour base image, the 1-2 contour base image, ..., and the 1-n contour base image through at least one continuous combination of parallel translation, inversion, rotation, enlargement, and reduction of the first contour base image.

[0017] The present invention is a latent image forming body further comprising a second composite latent image element group, in which 2-1 contour base image, 2-2 contour base image, ..., 2-m contour base image (m is an integer of 2 or more) which gradually differ in at least one of position and shape by continuous combination of at least one of parallel translation, inversion, rotation, enlargement and reduction of a second contour base image having the same shape or a different shape as the first contour base image, are formed of a plurality of latent image elements which are divided and compressed or divided in a second direction different from the first direction, and in which the 2-1 latent image element group, 2-2 latent image element group, ..., 2-m latent image element group are regularly sequentially arranged without overlapping with each other, and the second composite latent image element group and the first composite latent image element group are formed as a geometric pattern by being combined based on their respective center points.

[0018] The present invention is a latent image forming member characterized in that the first composite latent image element group and the second composite latent image element group have different colors.

[0019] The present invention is a latent image forming member characterized in that the latent image element group constituting the first composite latent image element group has at least two or more different colors. Effect of the Invention

[0020] According to the present invention, when observed under reflected light or transmitted light without using a discriminating tool, it can be visually recognized as a highly decorative geometric pattern (colored pattern), making it possible to design designs with highly decorative designs.

[0021] Furthermore, the present invention makes it possible for a latent image to appear even when the discriminator is moved or the observation angle is changed, and can produce color changes and moving image effects depending on the observation angle.

[0022] Furthermore, the latent image forming body of the present invention can reveal an image even when the direction of use of the discrimination tool is changed, and when latent image forming bodies of different colors are formed by a printing technique, it is possible to make the color tone of the observed latent image different depending on the direction of use of the discrimination tool, and furthermore, in a latent image forming body formed by a group of latent image elements of at least two or more different colors, a latent image of various colors can be observed. This makes it possible to impart new functionality to the colored pattern prints used as designs in valuable printed matter, and to improve counterfeit resistance. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram showing an example of a latent image forming body of the prior art. [Diagram 2] FIG. 13 is a diagram showing an example of discrimination of a latent image forming body according to the prior art; [Diagram 3] FIG. 1 is a schematic diagram showing an example of a latent image forming member of the present invention. [Figure 4] FIG. 1 is a schematic diagram showing an example of a configuration of a latent image forming member of the present invention. [Diagram 5] FIG. 1 is a schematic diagram showing an example of a configuration of a latent image forming member of the present invention. [Figure 6] 1 is a schematic diagram showing an example of a method for producing a latent image forming member of the present invention. [Figure 7] FIG. 2 is a schematic diagram showing an example of a cross section of a substrate when the latent image forming member of the present invention is formed by a fill-in technique. [Figure 8] FIG. 2 is a diagram showing an example of how a latent image is developed from the latent image forming body of the present invention. [Figure 9] 1 is a schematic diagram showing an example of a moving image effect of a latent image produced by the latent image forming body of the present invention; [Figure 10] FIG. 13 is a schematic diagram showing an example of a latent image moving effect that appears from the latent image forming body of the present invention by overlapping a substrate on which the latent image forming body is formed by the fill-in technique with a discrimination tool and moving the discrimination tool. [Figure 11] 1A and 1B are diagrams showing examples of valuable printed matter using a latent image forming body of the prior art and valuable printed matter using a latent image forming body of the present invention; [Figure 12]FIG. 1 is a schematic diagram showing an example of a configuration of a latent image forming member of the present invention. [Figure 13] FIG. 1 is a schematic diagram showing an example of a configuration of a latent image forming member of the present invention. [Figure 14] 1 is a schematic diagram showing an example of a method for producing a latent image forming member of the present invention. [Figure 15] 1 is a schematic diagram showing an example of a method for producing a latent image forming member of the present invention. [Figure 16] 1 is a schematic diagram showing an example of a moving image effect of a latent image produced by the latent image forming body of the present invention; [Figure 17] FIG. 1 is a schematic diagram showing an example in which the latent image forming member of the present invention is composed of two base latent image forming members which are the same but different in color. [Figure 18] FIG. 1 is a schematic diagram showing an example of a configuration of two base latent image forming members having different shapes. [Figure 19] FIG. 1 is a schematic diagram showing an example of a configuration of two base latent image forming members having different shapes. [Figure 20] FIG. 13 is a diagram showing an example of a contour base image. [Figure 21] FIG. 13 is a diagram showing an example of a contour base image. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The latent image forming body of the present invention will be described in detail. Note that the present invention is not limited to the embodiments described below, and includes various other embodiments within the scope of the technical idea described in the claims.

[0025] (First embodiment) As shown in FIG. 3, the latent image forming body (A1) of the present invention includes a 1-1 latent image element group (1-1) obtained by dividing or dividing and compressing a first outline base image (α1-1) described later that is formed by extracting the outline of a base image (β1), and n or more (n is a natural number of 2 or more) 1-2 outline images (α1-2) to 1-n outline images (α1-1) that are rotated along a predetermined rotation direction and a predetermined angle based on the center point (O) of the first outline image (α1-1) and have different arrangement angles. The latent image forming body (A1) is composed of a first composite latent image element group (15) synthesized from one or more latent image element groups of 1-2 latent image element group (1-2) to 1-n latent image element group (1-n) obtained by dividing or dividing and compressing each of the 1-2 latent image element groups (1-2) to 1-n latent image element groups (1-n) according to a first rule, and is synthesized by arranging each of the latent image elements (1-1-1 to 1-nn) (n is an integer of 2 or more) constituting each of the latent image element groups (1-1 to 1-n) in a plurality of positions based on a center point (O) so that they do not overlap each other.

[0026] Next, the configuration of the latent image forming body (A1) of the present invention will be described using as an example one of the 1-1 latent image element group (1-1) constituting the first composite latent image element group (15).

[0027] FIG. 4 is a diagram showing one first latent image element group (1-1) constituting the latent image forming body (A1) according to the present invention shown in FIG. 3 described above. The 1-1 latent image element group (1-1) is formed by extracting a contour from a base image (β1) which is a solid image of "cherry blossoms" composed of five cherry blossom petals to form a first contour base image (α1-1), and dividing the first contour base image (α1-1) in a first direction (S1) with a first line width (W1) which is a first rule, to form a plurality of first latent image elements (1-1-1 to 1-1-n), which are arranged in the first direction (S1) at a first pitch (P1). In the first embodiment, the contour base image (α1-1) is formed by extracting a contour from the base image (β1), but the image itself formed by only the contour line may be the first contour base image (α1-1).

[0028] Furthermore, for each of the latent image element groups (1-2 to 1-n), the 1-2 contour base image (α-2) to the 1-n contour base image (α-n) are formed by the same means as for the 1-1 latent image element group (1-1).

[0029] In this specification, "division" refers to extracting an original image in a certain direction and a certain width according to the first rule or the second rule described later to create a latent image element. Also, "division compression" refers to applying a frame (9) to an original image (β1) to cut out a part of it in a certain size, and reducing it in a certain direction (S1) at a specified compression rate to create a latent image element of a certain width (W1), as shown in Figure 5.

[0030] In the present invention, a geometric pattern (colored pattern) refers to a pattern created by continuously combining and expanding an arrangement of simple geometrical figures such as polygons (e.g., triangles, quadrangles, etc.), circles, and straight lines as components while performing operations such as translation, inversion, rotation, enlargement, and reduction, and by repeating the same operations, an infinite number of patterns can be developed. Note that in this specification, a geometric pattern (colored pattern) created by rotating and combining multiple contour images will be described as an example.

[0031] Next, an example of a method for producing the latent image forming member (A1) according to the present invention will be described in detail with reference to FIG.

[0032] FIG. 6 shows an example in which a latent image forming body (A1) is produced by combining three latent image element groups, namely, latent image element group 1-1 (1-1), latent image element group 1-2 (1-2), and latent image element group 1-3 (1-3). However, the present invention is not limited thereto, and the number of latent image element groups is not limited to three, and can be any number. In addition, by forming the latent image element groups from mutually different base images, it is also possible to make the latent image that appears different depending on the position of the discrimination tool. The first contour base image is shown in FIG. 20.

[0033] FIG. 6 shows a 1-1 latent image element group (1-1) corresponding to a divided image obtained by dividing the first contour base image (α1-1) shown in FIG. 20(a), a 1-2 latent image element group (1-2) corresponding to a divided image obtained by dividing a 1-2 contour base image (α1-2) rotated in a predetermined rotation direction (T1) at a predetermined angle (θ1) based on a center point (O), and a 1-3 latent image element group (1-3) corresponding to a divided image obtained by dividing a 1-4 contour base image (α1-4) rotated further at a predetermined angle (θ2). FIG. 1 shows a 1-3 latent image element group (1-3) corresponding to an image, and further shows a latent image forming body (A1) according to the present invention in which all of the latent image elements of the 1-1 latent image elements (1-1-1 to 1-1-n), the 1-2 latent image elements (1-2-1 to 1-2-n), and the 1-3 latent image elements (1-3-1 to 1-3-n) constituting each of the latent image element groups (1-1, 1-2, 1-3) are sequentially arranged in a first direction (S1) so as not to overlap.

[0034] In the present invention, the first latent image element group (1-1) is formed by arranging two or more 1-1 latent image elements (1-1-1 to 1-1-n) constituting the first latent image element group (1-1) at a constant pitch. The 1-2 latent image element group (1-2) is also formed by arranging two or more 1-2 latent image elements (1-2-1 to 1-2-n) constituting the 1-2 latent image element group (1-2) at a constant pitch, and the 1-3 latent image element group (1-3) is also formed by arranging two or more 1-3 latent image elements (1-3-1 to 1-3-n) at a predetermined pitch.

[0035] Note that "arranging a plurality of them in sequence in the first direction (S1) so as not to overlap each other" means the following.

[0036] As shown in FIG. 6, for the 1-1 latent image elements (1-1-1 to 1-1-n), 1-2 latent image elements (1-2-1 to 1-2-n), and 1-3 latent image elements (1-3-1 to 1-3-n) arranged in order in the first direction (S1), the first latent image element (1-1-1), the 1-2 latent image element (1-2-1), and the 1-3 latent image element (1-3-1) are respectively taken out and arranged in order so as not to overlap.

[0037] Furthermore, by similarly arranging the 1-1 latent image element (1-1-n), the 1-2 latent image element (1-2-n), and the 1-3 latent image element (1-3-n) at the final end (n-th) in the first direction (S1) in that order in the first direction (S1), "a plurality of elements are arranged in sequence in the first direction so as not to overlap with each other." In this way, the latent image forming body (A1) according to the present invention is produced.

[0038] The "predetermined pitch" refers to the (almost) same pitch in the 1-1 latent image elements (1-1-1 to 1-1-n), 1-2 latent image elements (1-2-1 to 1-2-n), and 1-3 latent image elements (1-3-1 to 1-3-n).

[0039] By increasing the number of latent image element groups, when a latent image is displayed using a discriminator and a moving image effect is expressed in the latent image by changing the observation angle or moving the discriminator, a moving image effect with smooth movement can be expressed. Note that it is preferable that the angle at which each outline base image is arranged is constant. If there is variation in the difference in the arrangement angles or if the differences are large, the moving image effect may become awkward, and if the differences are small, the moving image effect may be difficult to recognize.

[0040] In addition, by forming each latent image element group (1-1 to 1-n) in Fig. 6 with at least two or more different colors, it is possible to produce a latent image with a variety of colors in addition to the moving image effect caused by the change in observation angle or the movement of the discriminator. Also, the differences in color tone and color density between each latent image element group (1-1 to 1-n) can be adjusted as desired.

[0041] Next, as the latent image forming body (A1) of the present invention, a structure corresponding to the so-called "skinning technology" in which at least one of the latent image forming bodies (A1) formed on a substrate and recognized by the difference in the amount of transmitted light is formed as a recess and / or a protrusion on the substrate and can be visually recognized by the shade will be described.

[0042] Fig. 7 is a schematic diagram showing an example of a cross section of a substrate when the latent image forming body (A1) of the present invention is formed by the "watermarking technique". The latent image forming body (A1) shown in Fig. 7 is formed by forming 1-1 latent image elements (1-1-1 to 1-1-n), 1-2 latent image elements (1-2-1 to 1-2-n), and 1-3 latent image elements (1-3-1 to 1-3-n) which are relatively thin portions of the substrate (6) to form a watermark pattern.

[0043] The material for forming the base material (6) is not particularly limited as long as it is a light-transmitting material, and examples of such materials include known materials made of one or more types of paper, plastic, etc.

[0044] When paper is used for the substrate (6), the type of fiber constituting the substrate (6) is not particularly limited, and may be chemical pulp such as KP or SP made from various wood materials, mechanical pulp such as GP, TMP or CTMP, or recycled pulp from waste paper. Non-wood materials such as rice, abaca, cotton, kenaf, mitsumata, bamboo, etc. may also be used.

[0045] These fibers obtained from wood or non-wood may be used alone or in combination. Colored paper made by blending pigments or dyes of various colors may be used as the substrate (6). Furthermore, commonly used chemicals such as sizing agents and paper strength agents, and fillers may be blended as additives to the paper as necessary.

[0046] Furthermore, when paper is used as the substrate (6), the thickness and basis weight of the paper are not particularly limited, and paper of a desired thickness and basis weight can be used. For example, the thickness can be 30 μm or more and 500 μm or less, and the basis weight can be 10 g / m 2 More than 500g / m2 From the viewpoint of handling and durability of the latent image forming body formed on the substrate, the thickness is 80 μm or more and 200 μm or less, and the basis weight is 50 g / m or less. 2 More than 200g / m 2 It is preferable that:

[0047] When using plastic as the substrate (6), there is no particular limitation as long as the material allows the transmitted light to be visually recognized. For example, not only transparent but also colored plastics can be used. As the type of plastic, for example, one or more of polyester, polyamide (nylon), polyvinyl chloride, polystyrene, polyethylene, polypropylene, (meth)acrylic resin, polyurethane, etc. can be used.

[0048] When the substrate (6) is paper, a "watermarking technique" can be used in the paper manufacturing process, in which a watermark pattern on a papermaking machine is formed as an uneven shape on a roll member such as a cylinder or dandy roll to form thick and thin layers in the paper. Also, when the substrate (6) is paper or plastic, a "watermarking technique" such as cutting the surface of the substrate (6) by laser processing can be used.

[0049] In the present invention, a watermarking technique using a watermarking ink that penetrates paper to increase light transmittance, or a watermarking technique using a light-shielding ink that is printed on the base material (6) such as paper to decrease light transmittance may be used. In this case, the surface of the base material (6) can be made smooth with few irregularities.

[0050] The latent image forming body of the present invention may be formed by printing having one or more color tones instead of using the "skinning technique". In this case, the latent image forming body of the present invention is produced by printing using ink of a desired color tone.

[0051] For printing, for example, printing means such as intaglio printing, letterpress printing, offset printing, gravure printing, screen printing, inkjet printing, etc. can be used. A latent image formed by printing with one or more color tones can be a latent image formed body with high designability and excellent anti-counterfeiting function (counterfeiting resistance), and is useful for applications in the field of valuable printed matter. Furthermore, it becomes possible to form a latent image formed body more easily than the "skinning technology".

[0052] The latent image forming body (A1) of the present invention can be made into an electronic latent image forming body (A1) by displaying it on a display, and is useful in fields such as preventing counterfeiting of valuable securities on electronic terminals such as e-tickets.

[0053] FIG. 8 is a diagram showing an example of the application of a discrimination tool (5) to the latent image forming body (A1) of the present invention to reveal and observe a latent image.

[0054] In FIG. 8, a latent image forming body (A1) is formed on a substrate (6), and a discrimination tool (5) is placed on top of the latent image forming body (A1), making it possible to observe the latent image.

[0055] The discrimination tool (5) may be, for example, one or more selected from the group consisting of a lenticular lens, a line filter (line sheet), etc. The discrimination tool (5) may be a separate tool that is stacked to reveal a latent image, or a layer having a function corresponding to the discrimination tool (5) may be formed on the latent image forming body (A1) to reveal a latent image.

[0056] There is no particular limitation on the method for forming a layer having a function equivalent to the discrimination tool (5) such as a lenticular lens on the substrate (6). For example, a discrimination tool (5) corresponding to the pitch of the latent image elements can be appropriately selected from commercially available discrimination tools (5) and fixed to the substrate (6) with an adhesive. The pitch of the latent image elements may be a pitch corresponding to the discrimination tool (5) selected in advance. Also, a layer having a function equivalent to the discrimination tool (5) may be formed by printing using a transparent resin as a printing material with a printing device capable of printing with raised areas such as screen printing, intaglio printing, or a UV ink jet printer.

[0057] Alternatively, a layer having a function corresponding to the distinguishing tool (5) may be formed by embossing after a plastic layer of a predetermined thickness is formed on the base material (6). In this case, the plastic layer is preferably a transparent plastic layer, and is preferably made of an ultraviolet-curable resin such as polyester acrylate, epoxy acrylate, urethane acrylate, or polyol acrylate.

[0058] 9 is a schematic diagram showing an example of a moving image effect of a latent image generated from the latent image forming body (A1) of the present invention. A discrimination tool (5) such as a lenticular lens is superimposed on the latent image forming body (A1) formed on the substrate (6).

[0059] As shown in FIG. 9, when the discriminator (5) is placed at the first position (10-1), the latent image (4-1) appears and can be observed. When the discriminator (5) at the first position (10-1) is moved to the second position (10-2) in the first direction (S1), the discriminator (5) causes the latent image (4-2) to appear and can be observed. Next, when the discriminator (5) is moved from the second position (10-2) to the third position (10-3), the latent image (4-3) appears and can be observed. By performing these operations consecutively, the cherry blossom pattern latent images (4-1, 4-2, 4-3) can be observed as a moving image rotating clockwise. In addition, when the latent image forming body (A1) formed by the squinting technique is observed under transmitted light while changing the observation angle, the latent image can be visually recognized as a moving image.

[0060] Next, regarding the latent image forming body (A1) of the present invention shown in FIG. 7 described above, an example of a moving image effect of a latent image appearing from the latent image forming body (A1) by overlapping the substrate (6) and the discrimination tool (5) and moving the discrimination tool (5) is described with reference to a schematic diagram in FIG. 10 showing the appearance of a latent image when the discrimination tool (5) is overlapped and moved.

[0061] In Fig. 10, 1-1 latent image elements (1-1-1 to 1-1-n), 1-2 latent image elements (1-2-1 to 1-2-n), and 1-3 latent image elements (1-3-1 to 1-3-n) are formed on the substrate (6) as relatively thin portions, and a plurality of these are sequentially arranged in a first direction (S1) so as not to overlap each other, thereby forming a latent image forming body (A1) as a watermark pattern. Also, a light source (7) is provided on the side of the substrate (6) where the latent image elements are not formed.

[0062] Only the 1-1 latent image elements (1-1-1 to 1-1-n) are sampled or enlarged and sampled by the discrimination tool (5) at the first position (10-1) of the latent image forming body (A1), and the latent image (4-1) is developed. Similarly, at a second position (10-2) shifted a predetermined amount in the first direction (S1) from the first position (10-1), only the 1-2 latent image elements (1-2-1 to 1-2-n) are sampled or enlarged by the discrimination tool (5) at the second position (10-2), thereby revealing the latent image (4-2). Similarly, at a third position (10-3) shifted a predetermined amount in the first direction (S1) from the second position (10-2), only the 1-3 latent image elements (1-3-1 to 1-3-n) are sampled or enlarged by the discrimination tool (5) at the third position (10-3), thereby revealing the latent image (4-3).

[0063] As described above, the latent image-formed body (A1) according to the present invention can be observed as a highly decorative geometric pattern (colored pattern) when the discriminator (5) is not used, and the design of valuable printed matter to which the latent image-formed body (A1) is applied can be improved. In addition, by changing the observation angle or moving the discriminator (5) such as a lenticular lens, it is possible to create a moving image effect in the latent image. This makes it possible to obtain a latent image-formed body with a highly decorative design and a high anti-counterfeiting effect. Furthermore, even when the latent image-formed body is formed by printing, not just by the "squeezing technology", it is possible to obtain a latent image-formed body with a highly decorative design and a high anti-counterfeiting effect.

[0064] For example, as shown in valuable printed matter (8) in Fig. 11(a), the latent image (B1) of the prior art has low design quality, is not visible as a geometric pattern (colored pattern), and is difficult to integrate with the perforation technology of a face image or the like formed on the valuable printed matter (8), so the design of the valuable printed matter (8) is limited. On the other hand, as shown in valuable printed matter (8) in Fig. 11(b), the latent image forming body (A1) of the present invention can be viewed as a geometric pattern (colored pattern), has high design quality in itself, and is easily integrated with the perforation technology as the background of a face image or the like, making it possible to improve the freedom of design and the design.

[0065] Next, a description will be given of a latent image forming body (A2) capable of developing a latent image by combining a second composite latent image element group (16) formed by arranging a plurality of second latent image element groups (2-1) formed by dividing a contour base image according to a second rule and arranging the second latent image elements having different shapes according to a predetermined rule with the latent image forming body (A1) described above, and superimposing the discrimination tool (5) in a second direction (S2). Note that a description of the same contents as those of the first embodiment described above will be omitted.

[0066] (Second embodiment) A latent image forming body (A2) in the second embodiment is shown in Fig. 12. The latent image forming body (A2) is formed by combining a latent image forming body (A1) formed by the same means as in the first embodiment described above with a second composite latent image element group (16) formed by arranging a plurality of second latent image element groups (2-1) according to a predetermined rule, the second latent image elements each having a different shape formed by dividing the second outline base image (α2) shown in Fig. 21 according to a second rule, with the center point (O) of the second composite latent image element group (16) as a reference.

[0067] Next, the 1-1 latent image element group (1-1) forming the latent image forming body (A1) and the second latent image element group (2-1) forming the second composite latent image element group (16) will be described with reference to FIG. 13. As shown in FIG. 13(a), the method of producing the 1-1 latent image element group (1-1) from the first contour base image (α1-1) is the same as that of the first embodiment described above. On the other hand, the second latent image element group (2-1) shown in FIG. 13(b) is formed by arranging a plurality of 2-1 latent image elements (2-1-1 to 2-1-m) (m is a natural number of 2 or more) formed by dividing the second contour base image (α2-1) in the second direction (S2) by the second image width (W2) as the second rule, at a second pitch (P2) in the second direction (S2). As shown in FIG. 13, in the second embodiment, the first contour base image (α1-1) and the second contour base image (α2-1) are formed from base images (β1') of the same shape, and therefore have the same shape, but the base images (β1) may have different shapes.

[0068] Furthermore, an example of creating a second composite latent image element group (16) by combining the 2-1 latent image element group (2-1), the 2-2 latent image element group (2-2), and the 2-3 latent image element group (2-3) will be described with reference to Fig. 14. Each contour base image is shown in Fig. 21.

[0069] As shown in FIG. 14, there are a 2-1 latent image element group (2-1) corresponding to a divided image obtained by dividing the second contour base image (α2-1) according to the second rule, a 2-2 latent image element group (2-2) corresponding to a divided image obtained by dividing a 2-2 contour base image (α2-2) rotated in a predetermined rotation direction (T1) at a predetermined angle (θ1) based on the center point (O) of the second contour base image (α2-1), and a 2-3 latent image element group (2-3) corresponding to a divided image obtained by rotating in a predetermined rotation direction (T1) at a predetermined angle (θ2). A second composite latent image element group (16) according to the present invention is constituted by arranging a plurality of 2-3 latent image element groups (2-3), which correspond to divided images obtained by dividing the base image (α2-3), based on the center point (O) so that none of the latent image elements of the 2-1 latent image elements (2-1-1 to 2-1-m), the 2-2 latent image elements (2-2-1 to 2-2-m), and the 2-3 latent image elements (2-3-1 to 2-3-m) constituting each of the latent image element groups (2-1, 2-2, 2-3) overlap.

[0070] In the second embodiment, the 2-1 latent image element group (2-1) is formed by arranging two or more 2-1 latent image elements (2-1-1 to 2-1-m) constituting the 2-1 latent image element group (2-1) at a second pitch (P2). The 2-2 latent image element group (2-2) is also formed by arranging two or more 2-2 latent image elements (2-2-1 to 2-2-m) constituting the 2-2 latent image element group (2-2) at a constant second pitch (P2), and the 2-3 latent image element group (2-3) is also formed by arranging two or more 2-3 latent image elements (2-3-1 to 2-3-m) at a constant second pitch (P2).

[0071] The method for producing the latent image forming body (A1) shown in FIG. 15 is similar to that for the latent image forming body (A1) in the first embodiment described above, and since the three latent image element groups, 1-1 latent image element group (1-1), 1-2 latent image element group (1-2), and 1-3 latent image element group (1-3), are arranged and synthesized based on the center point (O) so that all of the latent image elements do not overlap, detailed explanation will be omitted.

[0072] Next, an example of a moving image effect of a latent image generated from the latent image forming body (A2) of the present invention will be described with reference to Fig. 16. A discrimination tool (5) such as a lenticular lens is superimposed on the latent image forming body (A2) formed on the substrate (6).

[0073] As shown in FIG. 16, when the discriminator (5) is placed at the first position (10-1), the latent image (4-1) appears and can be observed. When the discriminator (5) at the first position (10-1) is moved to the second position (10-2) with respect to the first direction (S1), the discriminator (5) causes the latent image (4-2) to appear and can be observed. Next, when the discriminator (5) is moved from the second position (10-2) to the third position (10-3), the latent image (4-3) appears and can be observed. By performing these operations consecutively, the cherry blossom pattern latent images (4-1, 4-2, 4-3) can be observed as a moving image rotating clockwise. In addition, when the observation angle is changed under transmitted light, the latent image dynamically changes and can be visually recognized.

[0074] Also, when the discriminator (5) is rotated 90 degrees to the second direction (S2) and placed at the first position (11-1), the latent image (12-1) appears and can be observed. When the discriminator (5) at the first position (11-1) is moved to the second position (11-2) in the second direction (S2), the discriminator (5) causes the latent image (12-2) to appear and can be observed. Next, when the discriminator (5) is moved from the second position (11-2) to the third position (11-3), the latent image (12-3) appears and can be observed. By performing these operations consecutively, it becomes possible to observe the latent images (12-1, 12-2, 12-3) of the cherry blossom crest as a moving image rotating clockwise.

[0075] Therefore, not only can a latent image be made to appear when the discriminator (5) is stacked so that the direction of action of the discriminator (5) is horizontal to the first direction (S1), but also a latent image can be made to appear even when the discriminator (5) is stacked so that the direction of action of the discriminator (5) is different from the first direction (S1).

[0076] Here, an example is described in which the second composite latent image element group (16) is composed of three latent image element groups (2-1 to 2-3), but the number may be different from that of the first composite latent image element group (15). Furthermore, the rotation angle of the outline base image does not have to be the same as that of the first embodiment. As shown in FIG. 17, the latent image forming body (A2) in the second embodiment can have latent images of different colors appear by changing the observation angle or moving the distinguishing tool in addition to the moving image effect, by making the latent image forming body (A1) and the second composite latent image element group (16) have different colors. Moreover, the difference in color tone and color density between the two latent image forming bodies (A1, A2) can be adjusted as desired.

[0077] Alternatively, as shown in FIG. 18, a second contour base image (α2'-1) having a different shape from the first contour base image (α1-1) formed from a base image (β1'-1) having a different shape from the first contour base image (α1-1) is used to generate a 2-1 latent image element group (2'-1) corresponding to a divided image obtained by dividing the 2-1 contour base image (α2'-1) at the first arrangement angle in the second direction (S2), a 2-2 latent image element group (2'-2) corresponding to a divided image obtained by dividing the 2-2 contour base image (α2'-2) at the second arrangement angle in the second direction (S2), and a 2-3 contour base image (α2' The 2'-1 latent image elements (2'-1-1 to 2'-1-m), the 2'-2 latent image elements (2'-2-1 to 2'-2-m), and the 2'-3 latent image elements (2'-3-1 to 2'-3-m) (latent image elements are not shown) constituting the 2-3 latent image element group (2'-3) corresponding to the divided image obtained by dividing the 2'-3 latent image element group (2'-3) in the second direction (S2), are sequentially arranged in plurality based on the center point (O) so that none of the latent image elements overlap, to produce a second composite latent image element group (17), which can be composited with the latent image image forming body (A1) in the first embodiment to form the latent image image forming body (A3) shown in FIG. 19 (the contour base images (α2'-2, α2'-3) are not shown).

[0078] When the discriminator (5) is placed on the latent image forming body (A3) shown in Fig. 19 in the first direction (S1), the first latent image (13) can be made to appear, and a moving image effect can also be produced by changing the observation angle or moving the discriminator, and when the discriminator (5) is placed on the latent image forming body (A3) in the second direction (S2), the second latent image (14) can be made to appear, and a moving image effect can also be produced by changing the observation angle or moving the discriminator (5). Note that the second direction (S2) is shown as an example perpendicular to the first direction (S1), but is not limited thereto.

[0079] (Applications of latent image forming body) The latent image forming body of the present invention can be formed by watermarking, printing, multi-color printing, electric screens, etc., and has high designability and excellent anti-counterfeiting function (counterfeiting resistance), and therefore can be used for valuable printed matters with high designability and various certificates, etc.

[0080] For example, the latent image forming body can be formed as a watermark by forming it so that it is visible under transmitted light depending on the density or thickness of the substrate, by forming it from a material that increases the light transmittance by penetrating the substrate, or by forming it from a material that decreases the light transmittance by coating or printing it on the substrate.

[0081] In addition, by using printing methods such as intaglio printing, letterpress printing, offset printing, gravure printing, screen printing, and inkjet printing, it is possible to produce a latent image forming material with high designability and excellent anti-counterfeiting function (counterfeiting resistance), which is useful for applications in the field of valuable printed matter. [Explanation of symbols]

[0082] β1 base image B1 Prior art latent image Ba latent image Bb Observation image A1, A2, A3 Latent image forming body 1-1 Latent image element group 1-1 2-1 Latent image element group 2-1 α1-1 Contour base image of 1-1 α1-2 Contour base image of 1-2 α1-3 Contour base image of 1-3 α2-1 Contour base image of 2-1 α2-2 Contour base image of 2-2 α2-3 Contour base image of 2-3 1-1-1, 1-1-2, 1-1-n First latent image element 2-1-1, 2-1-2, 2-1-m Second latent image element 4 Latent image 5. Discrimination tool 6 Base material 7 light source 8 Rare Prints 9 Frame 10. Location of discriminator 11. Location of discriminator 12 Latent image 13 The First Latent Image 14 The Second Latent Image 15 First composite latent image element group 16, 17 Second composite latent image element group

Claims

1. a latent image forming body having a first composite latent image element group in which a 1-1 contour base image, a 1-2 contour base image, ..., a 1-n contour base image (n is an integer of 2 or more) are formed on at least a part of a base material using a plurality of latent image elements divided and compressed or divided in a first direction, and the 1-1 latent image element group, the 1-2 latent image element group, ..., the 1-n latent image element group are regularly and sequentially arranged without overlapping with each other, The 1-1st contour base image, the 1-2nd contour base image, ..., the 1-nth contour base image are formed as a geometric pattern by gradually changing at least one of the positions and shapes of the 1st composite latent image element group through a continuous combination of at least one of translation, inversion, rotation, enlargement, and reduction of the 1st contour base image.

2. the second contour base image is formed on at least a portion of the base material with a plurality of latent image elements, each of which is divided and compressed or divided in a second direction different from the first direction, and in which at least one of a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, a position and a shape of the second contour base image, 2. The latent image forming member according to claim 1, wherein the second composite latent image element group and the first composite latent image element group are synthesized with reference to their respective center points to form a geometric pattern.

3. 3. The latent image forming member according to claim 2, wherein said first composite latent image element group and said second composite latent image element group are of different colors.

4. 2. The latent image forming member according to claim 1, wherein the latent image elements constituting the first composite latent image element group are of at least two or more different colors.

Images