JP7010203B2 - Latent image forming body - Google Patents

Description

The present invention relates to a latent image forming body applied to banknotes, passports, stock certificates, gift certificates, revenue stamps, various tickets, other securities, and the like.

Recent advances in digital devices such as scanners, printers, and copiers have made it possible to easily produce elaborate reproductions of valuable printed matter. For this reason, banknotes, passports, stock certificates, gift certificates, revenue stamps, various tickets, and other securities have monetary value, so it is required to provide advanced anti-counterfeiting technology and authenticity discrimination technology. ing.

Typical examples of these anti-counterfeiting techniques and authenticity discrimination techniques include printing with special inks, holograms, threads, printing of minute characters, plow-in, and embedding techniques for latent image images. In particular, with the technology for embedding a latent image, the latent image cannot be visually recognized when observed from directly above the printed surface, but the latent image appears when observed at an angle, so a dedicated device is required. However, it is used in many valuable printed matter because it can be easily identified by human eyes. Examples of this technique include a technique of forming a latent image by utilizing the image line configuration of an intaglio printed matter, and a technique of forming a latent image by combining unevenness of a base material and ink.

As a technique for forming a latent image using the image line composition of an intaglio printed matter, one of the vertical and horizontal strokes is formed on the printing substrate by intaglio printing, and the other is the background. It is formed by intaglio printing, and it is difficult to distinguish the latent image part and the background part when observing from directly above the printed surface, but when observing at an angle, the ink filling that is a feature of intaglio printing lines A technique is disclosed in which a density difference is generated between the latent image portion and the background portion due to the influence and the latent image image becomes apparent (see, for example, Patent Document 1).

As a technique for forming a latent image by combining the convex portion of the base material and the ink, various line patterns or relief patterns having the same color as or similar to the printing material, or a raised drawing line of either of both patterns can be used. , When observing from a specific direction by combining various multi-line drawing or net-dot drawing line with a certain interval of other colored lines different from the color of the raised picture line, or both of them. Only in (see, for example, Patent Document 2) is disclosed an anti-counterfeit latent image printed matter in which a latent image can be recognized.

Next, as a technique for forming a latent image by combining the unevenness of the base material and the ink, at least one pattern of various universal patterns or relief patterns representing the pattern by partially changing the angle is used. On a material having an uneven shape formed by embossing, at least one of various multi-line drawing lines or net dot drawing lines having a certain interval is parallel to a part constituting a part other than the above-mentioned uneven shape pattern. Alternatively, it is a special latent image pattern forming body printed with an inclination, and the latent image is not visible when the special latent image pattern forming body is observed from directly above the printed surface, but the latent image is observed at an angle. Therefore, a technique is disclosed in which a latent image can be visually recognized and authenticity can be determined depending on the presence or absence of the visual recognition (see, for example, Patent Document 3).

Furthermore, as a technique for forming a latent image by combining the unevenness of the base material and ink, a latent image portion, a contour portion, and a background portion are provided, and the phase of the convex portion of each portion is changed to surround the latent image image. A technique for adding a contour image is disclosed (see, for example, Patent Document 4).

In addition, as a technique for providing a shadow image in a latent image using the image line configuration of a concave print, the direction of the concave image is changed for each area of the latent image, the shadow image, and the background image. A technique for observing a latent image in three dimensions when observed from a predetermined viewpoint is disclosed (see, for example, Patent Document 5).

Special Publication No. 56-19273 Japanese Patent No. 2600094 Japanese Patent No. 2615401 Japanese Patent No. 5062645 Japanese Patent No. 5599124

However, in Patent Document 1, since the latent image portion is formed on one of the vertical and horizontal strokes and the background portion is formed on the other side, the latent image image is obtained when observed from directly above the printed surface. There was a problem that was visually recognized.

Further, in the techniques of Patent Documents 1, 2 and 3, when the printed matter is tilted and observed, the latent image portion and the background portion are visually recognized in different colors, but the authenticity is discriminated only by a simple density difference which is two gradations. Since it is a method, a more advanced authenticity discrimination method has been required.

Further, since the latent image images or contour images of Patent Documents 1, 2, 3 and 4 are true / false discrimination of only a simple planar image, they are more than a planar image having better visibility and design of the latent image image. There was a need for an advanced authenticity discrimination method.

Further, in Patent Document 4, when the arrangement area where the latent image is provided is small, the contour image around the latent image cannot secure a sufficient area, so that the contour image is difficult to see, and the contour image is provided. As a result, the area of the latent image itself, which is the main image, becomes smaller and the visibility of the latent image deteriorates. Therefore, a configuration with a higher degree of freedom in designing has been required.

Further, since the structure of Patent Document 5 is formed only by a simple raised image line, the structure is simple and counterfeiting is easy, so that improvement in counterfeiting resistance has been required. Further, since it is configured by changing the direction of the raised black image line as in Patent Document 1, there is a problem that light is reflected depending on the direction of the light source and the latent image is visually recognized. In order to solve this problem, there is a method of adding a camouflage image, but since the image composition becomes dense and the latent image forming body becomes dark, a composition with a higher degree of freedom in color is required. rice field.

Therefore, the present invention aims to solve the above-mentioned problems, and by improving the visibility of the latent image image as compared with the conventional case, the latent image image forming body having excellent authenticity discrimination and designability is improved. The purpose is to provide.

The latent image forming body of the present invention is a latent image forming body in which a latent image is formed on at least a part of a base material, and the latent image is a main image portion, a shadow image portion, and a background portion. The shadow image portion is arranged so as to form a projection shape and adjacent to at least a part of the main image portion, and the main image portion, the shadow image portion, and the background portion have a concave or convex shape. A plurality of first elements having a In the main image section, the shadow image section, and the background section, a plurality of second elements having a color different from that of the base material are arranged at the first pitch in the same or different second direction as the first direction. When the latent image is observed from directly above, only the second element is observed, and when the latent image is observed at a predetermined angle, the visual densities of the main image, the shadow image, and the background image are different, and a predetermined value is obtained. It is characterized in that a shadow image appears at a position where it can be seen in a projection and is observed three-dimensionally according to the observation position.

In the latent image image forming body of the present invention, the latent image image further has a connecting portion, and the first element is the first element of the main image portion, the first element of the shadow image portion, and the background portion . It consists of the first element of the main image part, has the first element of the connecting part between the first element of the main image part and the first element of the shadow image part, and has the first element of the shadow image part and the background part . When the first element of the connecting portion is provided between the first elements of the above and the latent image is observed at an inclination of a predetermined angle, a density difference occurs between the main image, the shadow image and the background image, and the latent image is formed. The feature is that the image is observed in multiple gradations.

In the latent image image forming body of the present invention, the main image portion, the shadow image portion, and the background portion have a second element having a first color different from that of the base material, and a second element different from the base material and the first color. When a plurality of second elements having the same color are alternately arranged at the first pitch and the latent image is observed at a predetermined angle, the main image, the shadow image, and the background image are observed in different colors. It is characterized by that.

The latent image forming body of the present invention cannot visually recognize the latent image when observed from directly above the printed surface, but can visually recognize the latent image including the shadow image when observed with the printed surface tilted. .. That is, in the conventional technique, the latent image is determined to be true or false based on the plane image, but in the latent image of the present invention, the shadow image added to the main image can be visually recognized with a density difference, so that the main image is the first. Since the surface and shadow image have a sense of depth as the second surface and have a three-dimensional effect, and can be visually recognized as a latent image with excellent design, authenticity can be easily determined.

Further, in the latent image image forming body of the present invention, since the main image, the shadow image and the background portion can be visually recognized at different densities, the latent image image also has multiple gradations, and the design is excellent and the visibility of the latent image image is excellent. It is excellent and can be easily determined to be true or false.

Further, since the latent image image forming body of the present invention is configured by making the phases of the convex portions of the main image, the shadow image, and the background portion different from each other, the convex configuration becomes complicated and the anti-counterfeiting property is improved.

Further, the latent image forming body of the present invention has a high concealing property of the latent image even when viewed from directly above, and if there is a contrast between the convex portion and the many lines, the color of the many lines can be freely selected. , High degree of freedom in design.

Further, since the shadow image of the latent image forming body of the present invention can be provided so as to be superimposed on the rear of the main image, a dedicated area is not required and the design is easy even when the arrangement area is small.

It is a top view of the convex part of the 1st element. It is sectional drawing (XX') of FIG. It is a perspective view of FIG. It is a top view which combined the convex part of the 1st element and the universal line of a 2nd element, and has a high visual density. FIG. 4 is a cross-sectional view (XX') of FIG. It is a perspective view of FIG. FIG. 6 is a view obtained by observing FIG. 6 from a predetermined viewpoint (S1). FIG. 3 is a plan view showing a medium level of visual density in which the convex portion of the first element and the universal line of the second element are combined. FIG. 8 is a cross-sectional view (XX') of FIG. FIG. 9 is a perspective view of FIG. FIG. 10 is a view obtained by observing FIG. 10 from a predetermined viewpoint (S1). It is a top view which combined the convex part of the 1st element and the universal line of a 2nd element, and has a low visual density. FIG. 12 is a cross-sectional view (XX') of FIG. It is a perspective view of FIG. FIG. 14 is a view obtained by observing FIG. 14 from a predetermined viewpoint (S1). It is a figure which shows the visual density when the phase of a convex part and a man line is changed. It is a figure which shows the embodiment of this invention. It is a figure which shows the 1st latent image forming body of this invention. It is an enlarged view of FIG. It is a perspective view of FIG. FIG. 20 is a view obtained by observing FIG. 20 from a predetermined viewpoint (S1). It is a figure which shows the morphology of the convex part of the latent image morphology of this invention. It is a figure which shows the morphology of the shadow image of the latent image morphology of this invention. It is a figure which shows the arrangement of the shadow image of the latent image form of this invention. It is a figure which shows the visual density of the main image, the shadow image and the background image of the latent image morphology of this invention. It is an enlarged view which shows the 2nd latent image forming body of this invention. It is a perspective view of only the convex part of FIG. 26. It is a perspective view of FIG. 26. FIG. 27 is a view obtained by observing FIG. 27 from a predetermined viewpoint (S1). It is an enlarged view which shows the 3rd latent image forming body of this invention. It is a perspective view of FIG. FIG. 30 is a view obtained by observing FIG. 30 from a predetermined viewpoint (S1). It is an enlarged view which shows the 4th latent image forming body of this invention. It is a perspective view of FIG. 33. FIG. 33 is a view obtained by observing FIG. 33 from a predetermined viewpoint (S1).

A mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments as long as it is within the scope of the technical idea in the claims.

(First idea of the present invention)
First, the "first idea" of the present invention includes a universal convex portion (T) having the same color as the base material formed on the base material which is the first element, and a base material which is the second element. By combining the various colored lines (M), the visual density can be controlled when observed from a predetermined viewpoint, which will be described with reference to FIGS. 1 to 19.

(Form with high visual density)
First, an example will be described in which the color of the second element, Mansen, can be visually recognized at a high density when observed from a predetermined viewpoint. FIG. 1 is a plan view of a convex portion (T) of a first element formed on the base material (1). The convex portion (T) is provided on one surface of the base material (1) and is regularly arranged in a universal line shape. Further, the convex portions (T) are adjacent to each other, the width (TW) of the convex portions (T) and the pitch (TP) of the convex portions (T) are the same, and the arrangement directions are also the same. The convex portion (T) includes one slope (Ta) and the other slope (Tb).

Next, FIG. 2 is a cross-sectional view (XX') of the base material (1) shown in FIG. At this time, the height (TH) of each convex portion (T) is the same. Further, FIG. 3 is a perspective view of the base material (1) shown in FIG. 2, and it can be seen that the convex portions (T) are adjacent to each other and are regularly arranged.

Next, FIG. 4 is a plan view showing a state in which the first element and the second element are combined, and the base material (1) is formed on the convex portion (T) formed on the base material (1) of FIG. Many lines (M) of different colors are printed regularly. At this time, the width (MW) of the universal wire (M) is 1/2 of the width (TW) of the convex portion (T), and the pitch (MP) of the universal wire (M) is that of the convex portion (T). Same as pitch (TP). Further, the universal wire (M) is arranged so as to overlap one of the slopes (Ta) of the convex portion (T).

FIG. 5 is a cross-sectional view (XX') of the base material (1) shown in FIG. 4, in which the ten thousand lines (M) overlap the entire slope (Ta) of the convex portion (T). FIG. 6 is a perspective view of the base material (1) shown in FIG. 5, in which convex portions (T) are adjacent to each other and are regularly arranged, and a universal line (M) is formed on one slope (Ta) of the convex portions (T). ) Are overlapped.

At this time, when observed from the same viewpoint (S1) as the angle of one slope (Ta) of the convex portion (T) shown in FIGS. 5 and 6, the color of the universal line (M) is as shown in FIG. Visible at high concentration. On the other hand, when observing from the same viewpoint (S2) as the angle of the other slope (Tb) of the convex portion (T), the color of the universal line (M) cannot be visually recognized, and only the color of the base material can be visually recognized (FIG. Not shown). When the base material (1) is observed from directly above, the ten thousand lines (M) can be visually recognized regularly.

(Form with medium visual density)
Next, an example will be described in which the color of the second element, the universal line (M), can be visually recognized at a medium level density when observed from a predetermined viewpoint. Since the above-mentioned configuration having a high visible density and the configuration of the convex portion (T) formed on the base material (1) are the same, the description thereof will be omitted.

FIG. 8 is a plan view showing a state in which the first element and the second element are combined, and the positions of the universal lines (M) having a high visible density in FIG. ) Is arranged by changing the 1/4 phase θ of the width (TW) of the convex portion (T) as compared with the convex portion (T) formed on the base material (1) of FIG. As a result, the ten thousand lines (M) are divided into 1/2 on one slope (Ta) of the convex portion (T) and halved on the other slope (Tb) and overlap.

FIG. 9 is a cross-sectional view of the base material (1) shown in FIG. 8, in which the universal line (M) is halved on one slope (Ta) of the convex portion (T) and on the other slope (Tb). Half of the 10,000 lines (M) overlap.

FIG. 10 is a perspective view of the base material (1) shown in FIG. 9, in which the convex portions (T) are adjacent to each other and regularly arranged, and the universal line (M) is a convex portion (M). It can be seen that 1/2 overlaps with one slope (Ta) of T) and 1/2 overlaps with the other slope (Tb).

At this time, when observed from the same viewpoint (S1) as the angle of one slope (Ta) of the convex portion (T) shown in FIGS. 9 and 10, the color of the universal line (M) is as shown in FIG. It can be visually recognized at a medium level (1/2 the visual density as compared with the form having a high visual density). It should be noted that when observed from the same viewpoint (S2) as the angle of the other slope (Tb) of the convex portion (T), it can be visually recognized in the same manner (not shown). Further, when the base material (1) is observed from directly above, the ten thousand lines (M) can be visually recognized regularly.

(Form with low visible density)
Next, it is an example in which the color of the second element can be visually recognized at a low density when observed from a predetermined viewpoint. Since the above-mentioned configuration having a high visible density and the configuration of the convex portion (T) formed on the base material (1) are the same, the description thereof will be omitted.

FIG. 12 is a plan view showing a combined state of the first element and the second element, and the positions of the universal lines (M) having a high visible density in FIG. 4 described above are the same, and the convex portion (T). ) Is arranged by changing the phase by 1/2 of the width (TW) of the convex portion (T) as compared with the convex portion (T) formed on the base material (1) of FIG. Therefore, it is arranged so as to overlap the slope (Tb) of the convex portion (T), which is different from the above-mentioned form having a high visual density.

FIG. 13 is a cross-sectional view (XX') of the base material (1) shown in FIG. 12, in which a universal line (M) overlaps the other slope (Tb) of the convex portion (T). FIG. 14 is a perspective view of the base material (1) shown in FIG. 13, in which convex portions (T) are adjacent to each other and are regularly arranged, and a universal line (M) is formed on one slope (Tb) of the convex portions (T). ) Are overlapped.

At this time, when observed from the same viewpoint (S1) as the angle of one slope (Ta) of the convex portion (T) shown in FIGS. 13 and 14, the color of the universal line (M) is as shown in FIG. Not visible, only the color of the substrate is visible. On the other hand, when observed from the same viewpoint (S2) as the angle of the other slope (Tb) of the convex portion (T), the color of the perimeter (M) can be visually recognized at a high density (not shown).

Therefore, by fixing the position of the universal line (M) and differently arranging the convex portion (T) formed on the base material (1), the universal line (M) can be observed from a predetermined viewpoint (S1). It can be seen that the visual densities of the colors in) are different.

(Setting of visual density)
Therefore, FIG. 16 shows the visual density when the phases of the fixed-positioned line (M) and the convex portion (T) are changed. First, level 1 has a configuration in which one slope (Ta) of the universal line (M) and the convex portion (T) is matched, and the phase θ = 0 at this time. Next, when the position of the universal wire (M) is fixed and the phase (θ) of only the convex portion (T) is gradually changed downward (level 2 to level 5), the convex portion (T) is formed. When observing from the same viewpoint (S1) as the angle of one inclination (Ta), it can be seen that the visual density of the ten thousand lines (M) gradually decreases. When observed from the same viewpoint (S2) as the angle of the other slope (Tb) of the convex portion (T), the opposite density can be visually recognized (not shown). Further, when the base material (1) is observed from directly above, the ten thousand lines (M) can be visually recognized regularly.

The phase (θ) is indicated by the ratio of the width (TW) of the convex portion (T), while the visible density is 100% when the visible density of the color of the ten thousand lines (M) is high. When is low, it is indicated by 0%. Therefore, by changing the phase (θ) of the universal line (M) and the convex portion (T), the visual density can be controlled when observing from a predetermined viewpoint (S1).

(Second idea of the present invention)
Next, the "second idea" of the present invention is to provide a main image (2a') and a shadow image (2b') with respect to the latent image image (2'), and in addition, the "first idea". ], A latent image (2') having a three-dimensional sense of depth can be visually recognized. Therefore, a specific description will be described in the following embodiments.

(First Embodiment)
FIG. 17 is a plan view showing an example of a latent image image forming body (hereinafter referred to as “forming body”) in the present invention. The forming body (10) is provided on at least a part of one surface on the base material (1), and necessary information such as a charge amount, characters, and other patterns is stored in a region other than the forming body (10). It may be applied by a known printing method (for example, offset printing, intaglio printing, etc.).

FIG. 18A is an enlarged view of the formed body (10), and has a projection shape on the main image portion (2a) which is the first surface and the main image portion (2a) which is the second surface. The area is divided into a shadow image portion (2b) and a background portion (3) that are adjacent to each other. The main image unit (2a) and the shadow image unit (2b) are latent image units (2) and can be visually recognized as a latent image image (2') when observed from a predetermined viewpoint. The connected image (4') described later is also included in the latent image image (2'). Further, in this embodiment, the character "T" is used for the main image. The projected shape referred to here is, for example, the shape of a shadow formed when the main image "T" is illuminated from a predetermined position.

Next, as shown in FIG. 18 (b), the formed body (10) has a convex portion (T) in which a plurality of first elements are arranged and a plurality of second elements in which a plurality of second elements are arranged. It is composed of lines (M), and the convex portion (T) has the same color as the base material, and is provided with a main image portion (2a), a shadow image portion (2b), and a background portion (3). Further, the width (TW), pitch (TP), height (TH) and direction of the convex portion (T) in each region are the same, but the phase of the convex portion (T) is different in each region. Further, the phase of the shadow image unit (2b) is deviated in the same direction with respect to the phase of the main image unit (2a). The convex portion (T) here shows only the apex of the convex portion (T), and each region includes a main image portion (2a), a shadow image portion (2b), a background portion (3), and a background portion (3). Refers to the connecting portion (4) described later. Further, in the present embodiment, white paper is used as the base material (1), and the convex portion (T) is provided by plow-in during the production of the paper.

On the other hand, as shown in FIG. 18C, the many lines (M) are printed in a color different from the color of the base material (1), and the width (MW) and pitch (MP) of the many lines (M) are printed. ), The direction is the same. The direction in which the convex portion (T) and the universal line (M) are arranged is also the same, and is referred to as the first direction here.

Next, FIG. 19 is an enlargement of the inside of the dotted line in FIG. 18 (a), and the convex portion (T) and the universal line (T) of the main image portion (2a), the shadow image portion (2b), and the background portion (3). The positional relationship of M) will be described.

The main image portion (2a) has the configuration of level 3 in FIG. 16, and the ten thousand lines (M) are laminated only on the slope (Ta) of the convex portion (T) and the upper half of the slope (Tb). Next, the shadow image portion (2b) has the configuration of level 1 in FIG. 16, and the ten thousand lines (M) are laminated on the slope (Ta) of the convex portion (T). Further, the background portion (3) has the configuration of level 5 in FIG. 16, and the perimeter (M) is laminated on the slope (Tb) of the convex portion (T). Therefore, the arrangement of the convex portions (T) in each region is different by the phase θ with respect to the universal line (M). Specifically, with respect to the convex portion (T) of the shadow image portion (2b), the phase θ = 1/4 TW of the convex portion (T) of the main image portion (2a) and the convex portion of the background portion (3). The phase θ of (T) is shifted by 1/2 TW. The phase θ may be in the plus direction (upward direction) or in the minus direction (downward direction).

(Action of this example)
Next, FIG. 20 is a perspective view of FIG. 19, in which the universal line (M) is located at different positions in the main image portion (2a), the shadow image portion (2b), and the convex portion (T) of the background portion (3). It can be seen that they are stacked.

Further, FIG. 21 is a latent image image (2') when observed from the viewpoint (S1) of FIG. 20, and among the latent image images (2'), the main image (2a') is the letter "T". Is visible at a visual density of 50%, the shadow image (2b') is visible on the back of the letter "T" at a visual density of 100%, and the background image (3') is visible at a visual density of 0%. For this reason, the images have different densities, and by providing a shadow image (2b') behind the main image (2a'), the images can be recognized with a sense of depth as a surface, so that the latent image has a stereoscopic effect. (2') can be visually recognized in a projected manner. When the formed body (10) is viewed from directly above, the latent image image (2') cannot be visually recognized and only the universal line (M) can be visually recognized, as shown in FIG. 18 (c). On the other hand, when observed from the viewpoint (S2), the visible density of the main image (2a') does not change, but the shadow image (2b') is visually recognized at 0% and the background image (3') is visually recognized at 100%. Therefore, the visual density differs depending on the viewpoint (not shown).

In the present invention, when the formed body (10) is observed from a predetermined viewpoint (S1), the main image (2a') is an image in which the main image portion (2a) can be visually recognized, and the shadow image (2b') is a shadow. The image portion (2b) can be visually recognized, the background image (3') is an image visible to the background portion (3), and the main image (2a') and the shadow image (2b') are latent images (3'). Is. Further, the connected image (4') described later refers to an image in which the connected portion can be visually recognized.

Conventionally, many applications have been filed for a latent image in which a 10,000-line convex or concave portion and a printed 10,000-line are combined, but in the prior art, the latent image is a planar image when observed from a predetermined viewpoint. .. On the other hand, in the present invention, by using the above-mentioned first and second ideas, the latent image is stereoscopic with the main image as the first surface and the shadow image as the second surface when observed from a predetermined viewpoint. Since it can be visually recognized as an image, it is possible to provide a latent image image forming body having higher authenticity discrimination, high forgery resistance, and excellent design.

(Structure of the first element and the second element)
Next, the configuration of the first element and the second element of the present invention will be described with reference to FIGS. 4, 19 and 20. The width (TW) and height (TH) of the convex portion (T) of the first element are 0.4 mm. However, the width (TW) and height (TH) are in the range of 0.1 to 2.0 mm, preferably 0.4 to 1.0 mm.

On the other hand, the width (MW) of the second element, Mansen (M), is 0.2 mm, and the pitch (MP) is 0.4 mm. However, the width (MW) of the universal wire (M) is in the range of 0.05 to 1.0 mm, preferably 0.2 to 0.5 mm, and the pitch (MP) is 0.1 to 2.0 mm. Within the range, it is preferably 0.4 to 1.0 mm. The width (MW) of the universal wire (M) is preferably 1/2 of the width (TW) of the convex portion (T), and the pitch (MP) of the universal wire (M) is the pitch of the convex portion (T). The same as (TP) is preferable, but is not limited to this.

Further, the phase (θ) of each convex portion (T) of each region of the present embodiment is such that the convex portion (T) of the main image portion (2a) is relative to the convex portion (T) of the shadow image portion (2b). The convex portion (T) of the background portion (3) is displaced by 0.1 mm by 0.2 mm. Although the shape of the convex portion (T) is shown in FIGS. 22 (a) and 22 (d), there is no problem as long as the shape has a side surface such as a triangular shape, a trapezoidal shape, or a hemispherical shape, and the convex portion (T). A flat area may be provided between the two. As shown in FIG. 22D, the back surface of the convex portion (T) is a concave portion, and the concave portion also has two slopes, so that the present embodiment can be provided and formed on both surfaces of the base material (1). It doesn't matter.

Further, as the method for forming the convex portion (T) of the first element, a known method may be selected and used. For example, a plow-in method, an embossing method, a printing method, a laser processing method, or the like can be used. On the other hand, as the method for forming the second element, the universal line (M), known printing methods such as offset printing, intaglio printing, gravure printing, and inkjet printing, laser processing, and the like can be used.

(Shadow image settings)
Further, FIGS. 23 (a) to 23 (d) show the form of the shadow image portion (2b) with respect to the main image portion (2a). FIG. 23A shows a direction in which the shadow image portion (2b) is formed by illuminating the “T” of the main image portion (2a) from a predetermined position with illumination (L1 to L8). For example, in the illumination (L1), the shadow image portion (2b) in FIG. 23 (b), in the illumination (L2), the shadow image portion (2b) in FIG. 23 (c), ..., In the illumination (L8), the figure. The shadow image portion (2b) of 23 (i) can be formed. Therefore, it is desirable that the shadow image portion (2b) is provided projectively in any one of the vertical direction, the horizontal direction, and the diagonal direction of the back surface of the main image portion (2a). In this embodiment, a shadow image unit (2b) is provided from the illumination (L2).

Further, FIGS. 24 (a) to 24 (e) are views showing the arrangement of the shadow image unit (2b) with respect to the main image unit (2a). FIG. 24 (a) is a diagram of only the main image portion (2a), and FIGS. 24 (b) to 24 (e) are arranged so that the shadow image portion (2b) is gradually shifted in one direction in the lower right direction. ing. At this time, as shown in FIG. 24 (e), if the main image portion (2a) and the shadow image portion (2b) are separated in both the vertical and horizontal directions (when the space S is provided), the two main images (2a) Is separated and overlapped, and the three-dimensional effect as a surface is impaired. On the other hand, as shown in FIGS. 24 (b) to 24 (d), if the shadow image portion (2b) overlaps or touches the main image portion (2a) both vertically and horizontally, the stereoscopic effect as a surface is stronger. Such a configuration is desirable because it can be felt.

Further, since the shadow image portion (2b) can be arranged so as to overlap the back surface of the main image portion (2a), a dedicated area is not required. Therefore, even when designing the size of the main image portion (2a), it is not necessary to reduce the size of the main image portion (2a) due to the limitation of the area of the shadow image portion (2b). The visibility of 2') and the degree of freedom in design are also high.

(Setting of visual density in each image)
Next, the form of the visual density of the formed body (10) when observed from a predetermined viewpoint will be described. In the present embodiment, the visible density of the main image (2a') is 50%, the visible density of the shadow image (2b') is 100%, and the visible density of the background image (3') is 0%. , The visible density of the main image (2a') is 100%, the visible density of the shadow image (2b') is 50%, the visible density of the background image (3') is 0%, and FIG. 25 (b) is the main image (2a'). The visibility density of 0%, the visibility density of the shadow image (2b') is 100%, the visibility density of the background image (3') is 50%, and FIG. This is an example in which the visibility density of the image (2b') is 0% and the visibility density of the background image (3') is 100%.

Further, regarding the setting of the visible density, since the visible density can be controlled by the positional relationship between the convex portion (T) and the universal line (M) in FIG. 16, it may be appropriately selected and used, but the shadow image (2b'). The larger the contrast between the background image (3') and the background image (3'), the easier it is to visually recognize the shadow image (2b') as a surface and to feel a three-dimensional effect. The visible density is 0%, 50%, and 100% as an example, but other visible densities can be set as shown in FIG.

(Main image settings)
Further, in the present embodiment, characters are used for the main image (2a') of the latent image image (2'), but numbers, symbols, marks, figures and the like may be used in addition to the characters. Further, instead of the universal line (M), a broken line, a wavy line, a letter, a number, a symbol, a figure, a mark, or the like may be used as long as the convex portion (T) can be concealed.

(Selection of base material)
Next, as the base material (1) in the present invention, paper leaves such as high-quality paper, coated paper, and art paper can be used. However, since the formed body (10) of the present invention requires the above-mentioned convex portion (T), the thickness of the base material (1) is preferably 20 μm to 1000 μm, preferably 50 μm to 300 μm. Further, films, plastics, composite materials thereof and the like can also be used. Further, the color of the base material (1) and the convex portion (T) should be a color having a low density such as white or yellow, and the color of the second element, Mansen, should be a color having a high density such as brown, purple or brown. This is preferable because the visibility of the latent image is increased due to the difference in contrast, but the difference is not limited to this.

(Second embodiment)
Next, the forming body (10) of the second embodiment will be described. The description of the same configuration as that of the first embodiment will be omitted, and only different configurations will be described. The present embodiment is characterized in that the gradation of the shadow image (2b') can be enhanced by adding the connecting portion (4).

FIG. 26 is an enlarged view of the second embodiment. A connecting portion (4) is provided between the main image portion (2a) and the shadow image portion (2b) and the shadow image portion (2b) and the background portion (3), respectively. The connecting portion (4) formed between the main image portion (2a) and the shadow image portion (2b) comprises the first element constituting the main image portion (2a) and the shadow image portion (2b). A plurality of first elements of the connecting portion (4) for connecting the constituent first elements are arranged. The first element of the connecting portion (4) is arranged with an inclination because it is in contact with each of the adjacent convex portions (T). Similarly, the connecting portion (4) formed between the shadow image portion (2b) and the background portion (3) includes the first element constituting the shadow image portion (2b) and the background portion (3). A plurality of first elements of the connecting portion (4) for connecting the first elements constituting the above are arranged. The first element of the connecting portion (4) is arranged with an inclination because it is in contact with the adjacent convex portions (T). Therefore, the convex portion (T) of the formed body (10) is connected in a relief shape.

Next, FIGS. 27 and 28 are perspective views of FIG. 26, FIG. 27 is a perspective view of only the convex portion (T), and FIG. 28 shows a perimeter (M) superimposed on the convex portion (T). It is a perspective view of the case. It can be seen that the ten thousand lines (M) are laminated at different positions at the convex portions (T) of each region. The convex portion (T) of each region and the universal line (M) are parallel to each other, while the convex portion (T) of the connecting portion (4) is in an oblique direction and therefore intersects with the universal line (M). ing.

Further, FIG. 29 is a latent image image (2') when observed from the viewpoint (S1) of FIG. 28, and among the latent image images (2'), the main image (2a') has a visual density of 50%. The shadow image (2b') can be visually recognized with a visual recognition density of 100%, and the background image (3) can be visually recognized with a visual recognition density of 0%. In addition, the visible density of the connected image (4') between the main image (2a') and the shadow image (2b') is higher than that of the main image (2a') and lower than that of the shadow image (2b'). can. On the other hand, the connected image (4) between the shadow image (2b') and the background image (3) is visible higher than the shadow image (2b') and lower than the background image (3'). Since the convex portion of the connecting portion (4) and the universal line (M) intersect in the connected image (4'), the main image (2a'), the shadow image (2b'), and the background image (3'). ) Can be visually recognized with different visual densities.

As a result, by adding the connected image (4') to the shadow image (2b') of the latent image image (2'), the latent image image (visual density is multi-gradation) as compared with the first embodiment ( It can be visually recognized as 2'), and more advanced authenticity discrimination can be provided. Further, since the convex portion (T) is also complicated, the forgery resistance is high.

(Third embodiment)
Next, the forming body (10) of the third embodiment will be described. The description of the same configuration as that of the first embodiment will be omitted, and only different configurations will be described. The present embodiment is characterized in that gradation can be imparted to the main image (2a') and the background image (3') by making the directions of the convex portion (T) and the universal line (M) different. be.

FIG. 30 is an enlarged view of the third embodiment, and the configuration different from the first embodiment is only in the direction of the universal line (M). At this time, if the direction in which the convex portion (T) is arranged is the first direction and the direction in which the universal line (M) is arranged is the second direction, the direction different from the first direction is the first and second directions. Are different, and different angles (d) can be freely selected.

Next, FIG. 31 is a perspective view of FIG. 30, and it can be seen that the universal lines (M) are laminated at different positions on the convex portions (T) of each region. Since the first and second directions are different, the convex portion (T) and the universal line (M) of each region intersect at different positions.

Further, FIG. 32 is a latent image (2') when observed from the viewpoint (S1) of FIG. 31, and the main image (2a') and the background image (3') are gradation images and shadow images. Of (2b'), the vertical region can be visually recognized as a visual density of 100%, and the horizontal region can be visually recognized as a gradation image. An image with gradation means an image in which the visual density gradually changes like a gradation. Since the vertical region of the shadow image (2b') is narrow in the horizontal direction, although there is a change in gradation strictly speaking, the gradation cannot be visually identified and is visually recognized as a solid image.

Further, the different angles (d) in the first and second directions are in the range of 0.5 to 30 degrees, preferably 0.5 to 5 degrees. This embodiment is an example in which the angle (d) is small, and specifically, it is set at 2 degrees. In this case, a gradation such as an interference fringe can be widely visually recognized in the lateral direction. On the other hand, as the angle (d) is widened, the width of the gradation in the horizontal direction is narrowed and the number of gradations is increased. Therefore, it may be appropriately selected and used (not shown). It should be noted that this mechanism is similar to the fact that interference fringes accompanied by gradation are easily generated by stacking two transparent films.

By making the first and second directions different in this way, the latent image image (2') and the background image (3') can be visually recognized as gradation images as compared with the first embodiment. , It is possible to provide more advanced authenticity discrimination and improve the design. It should be noted that the first and second embodiments may be combined and carried out.

(Fourth Embodiment)
Next, the forming body (10) of the fourth embodiment will be described. The description of the same configuration as that of the first embodiment will be omitted, and only different configurations will be described. It should be noted that the present embodiment is characterized in that, in particular, a colorful latent image can be visually recognized by making the color of the many lines (M) multicolored.

FIG. 33 is an enlarged view of the fourth embodiment, and the only configuration different from the first embodiment is that the colors of the ten thousand lines (M) are made multicolored. In the fourth embodiment, the case of forming with two colors will be described. At this time, the first color universal wire (Ma) is arranged at the same pitch as the pitch (TP) of the convex portion (T), and the second color universal wire (Mb) is also arranged at the same pitch as the convex portion (T). It is arranged at the same pitch as (TP), and a plurality of lines (Ma) of the first color and lines (Mb) of the second color are alternately arranged.

Next, FIG. 34 is a perspective view of FIG. 33, in which the first color universal line (Ma) and the second color universal line (Mb) are located at different positions in the convex portion (T) of each region. It can be seen that they are laminated.

Further, FIG. 35 is a latent image (2') when observed from the viewpoint (S1) of FIG. 34, and among the latent image images (2'), the background image (3') is the first color (1'). It can be visually recognized by Ma), the shadow image (2b') can be visually recognized by the second color (Mb), and the shadow image (2b') can be visually recognized by a mixed color of the first color (Ma) and the second color (Mb). can. On the other hand, when observing from the viewpoint (S2), the colors are reversed from those when observing from the viewpoint (S1). That is, the background image (3') is visible in the second color (Mb), the shadow image (2b') is visible in the first color (Ma), and the shadow image (2b') is visible in the first color (2b'). It can be visually recognized by a mixture of Ma) and the second color (Mb) (not shown).

The color has been described in the case of two colors, but the present invention is not limited to this, and a plurality of colors may be used.

The latent image forming body of the present invention can be mainly used for security products such as bank tickets, passports, stock certificates, gift certificates, revenue stamps, various tickets, and other securities.

1 Substrate 2 Latent image image part 2'Latent image image 2a Main image part 2a'Main image 2b Shadow image part 2b'Shadow image 3 Background part 3'Background image 4 Connecting part 4'Connected image 10 Latent image image forming body T Convex part Ta Convex slope Tb Convex slope TP Convex pitch TW Convex width TH Convex height θ Convex phase (shift amount)
M 10,000 lines MP Many lines pitch MW Many lines width d Angles in the first and second directions S1 Predetermined viewpoint S2 Predetermined viewpoint S Space

Claims (3)

A latent image forming body in which a latent image is formed on at least a part of a base material.
The latent image has a main image portion, a shadow image portion, and a background portion, and the shadow image portion is arranged so as to be adjacent to at least a part of the main image portion in a projection shape. Ori,
In the main image portion, the shadow image portion, and the background portion, a plurality of first elements having a concave or convex shape are arranged in a first direction at a first pitch in different phases, and the shadow. The phase of the image unit is shifted in the same direction with respect to the phase of the main image unit.
A plurality of second elements having a color different from that of the base material are present in the main image portion, the shadow image portion, and the background portion in the same or different second direction as the first direction at the first pitch. Arranged and made up
When the latent image is observed from directly above, only the second element is observed.
When the latent image is observed at an angle of a predetermined angle, the main image is a visible image of the main image portion, the shadow image is an image visible to the shadow image portion , and the background portion is visible. A latent image image forming body characterized in that the visual density of a certain background image is different, and the shadow image appears at a position where the shadow image can be seen in a projection manner and is observed three-dimensionally corresponding to a predetermined observation position. The latent image image further has a connecting portion, and is formed.
The first element is composed of a first element of the main image portion, a first element of the shadow image portion, and a first element of the background portion .
The first element of the connecting portion is provided between the first element of the main image portion and the first element of the shadow image portion, and the first element of the shadow image portion and the first element of the background portion. It has the first element of the connecting portion between the elements of
When the latent image image is observed at an angle of a predetermined angle, a density difference occurs between the main image, the shadow image, and the background image, and the latent image image is observed in multiple gradations. The latent image forming body according to claim 1. The main image portion, the shadow image portion, and the background portion are provided with a second element having a first color different from that of the base material and a second color different from the base material and the first color. A plurality of the second elements having are alternately arranged at the first pitch.
The latent image image forming body according to claim 1, wherein when the latent image image is observed at an angle of a predetermined angle, the main image, the shadow image, and the background image are observed in different colors.

Images