JP5552647B2 - Latent image pattern former - Google Patents

Description

  The present invention is a latent image pattern forming body that is applied to valuable printed matter such as banknotes, stock certificates, securities, passports, passports, gift certificates, and cards that are required to be counterfeited.

  Valuable printed matter such as banknotes, stock certificates, securities such as bonds, cards, various certificates and important documents are required not to be counterfeited or tampered with. Prevention measures include printing with special ink, hologram, thread, minute character printing, and the like.

  As a preventive measure as described above, the present applicant applies at least one of various line patterns or relief patterns representing patterns by partially different angles, and performs the printing. Proposing an invention of a latent image pattern forming body in which at least one of various line drawing lines or halftone dot drawing lines having a certain interval on the drawing line is printed with being parallel or inclined with respect to the printing drawing line. (For example, refer to Patent Document 1). When the latent image pattern forming body of the invention of Patent Document 1 is tilted and observed, various latent lines or relief patterns formed by raised printing are represented by partially different angles. The latent image can be observed when the visibility of various line-drawing lines or halftone-dotting lines having a certain interval printed on the pattern of the image and the background thereof are different.

  In addition, the applicant of the present invention is not limited to a substrate having a concavo-convex shape formed by embossing at least one of various line patterns or relief patterns representing a pattern by partially varying the angle. A latent image pattern formed body in which at least one of various line-drawing lines or halftone-dotting lines having an interval of is printed with being parallel or inclined with respect to a portion constituting a portion other than the above-mentioned uneven shape pattern. An invention has been proposed (see, for example, Patent Document 2). Note that, in the latent image pattern formed body of the invention of Patent Document 2, the latent image is observed when it is tilted and observed according to the same principle as that of the invention of Patent Document 1.

  In addition, a plurality of recesses are formed in a base material having a flat portion, and a first mark portion provided in the flat portion so as to surround the recess and an inner surface of a predetermined recess among the plurality of recesses It has a second mark portion provided over the entire circumference. When the base material is observed from the front, the first mark portion is mainly visually recognized. When the base material is tilted, the second mark portion is observed. An anti-counterfeit medium is disclosed in which a latent image composed of a portion is visually recognized (see, for example, Patent Document 3). Note that the anti-counterfeit medium of the invention of Patent Document 3 has the effect that the observation direction of the latent image is not limited because the second mark is formed so as to trace the inner surface of the recess.

Japanese Patent No. 2600094 Japanese Patent No. 2615401 JP 2008-12722 A

  However, in the inventions of Patent Document 1 and Patent Document 2, in various line drawing lines or relief patterns formed by raised printing or embossing, the angles are partially different, that is, the latent images are made different in phase. Therefore, it is necessary to provide a sufficient space between the various line-drawing lines or relief patterns constituting the pattern of the latent image and the background portion thereof. In addition, in various line patterns or relief patterns, in order to distinguish between the latent image pattern and the background part, it is necessary not to overlap adjacent line patterns or relief patterns. It is necessary to form various line patterns or relief patterns at regular intervals. Due to such a configuration, the inventions of Patent Document 1 and Patent Document 2 increase the resolution and visibility of the pattern of the latent image because the space between various line-drawing lines or halftone-dotting lines that are visually recognized as latent images is also increased. It was an obstacle in letting it go.

  In addition, for the invention of Patent Document 3, since the cross-sectional area of the concave portion is gradually narrowed toward the center of the concave portion and the second mark is provided on the inner surface where the cross-sectional area is narrowed, the observed latent image is The second marks formed in the recesses adjacent to each other were observed with an interval, which was an obstacle to improving the resolution and visibility of the latent image. In addition, a sufficient interval for providing the first mark portion is necessary in the plane portion between the recesses, and from this, the interval between the second marks observed as a latent image is also increased. Therefore, it has been an obstacle to improving the resolution and visibility of the latent image.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a latent image pattern formed body capable of observing a latent image having better resolution and visibility than conventional ones. .

  In order to solve the above-described problem, in the latent image pattern formed body of the present invention, a first element having a concave shape or a convex shape having the same color as that of the base material or a different color is provided on at least a part of the base material. A plurality of first patterns arranged in the direction and a second pattern formed by arranging a plurality of second elements having different colors from the first element in the second direction are formed. At least part of the first element constituting the latent image portion and the background portion are divided into a latent image portion and a background portion by partially different positions of the deepest portion or the top portion of the arranged first element. The second element overlaps at least a part of the first element constituting the first pattern, and the second pattern is observed when observed from directly above the base material, and the first pattern constituting the latent image portion is observed when the base material is observed obliquely. The position of the deepest part or the top part of the first element constituting the background part and the first part is different, so that the latent image part The first element and the first of the second element overlapping the element visibility differs for constituting the background portion constituting wherein the latent image is observed.

  Further, the present invention is characterized in that the first direction and the second direction are the same or different.

  The first element of the present invention is an image line.

  Further, the second element of the present invention is an image line and / or a pixel.

  Further, the present invention is characterized in that the first element constituting the latent image portion and / or the background portion is a single first element, and the position of the deepest portion or the position of the top portion is partially different.

  Further, the present invention is characterized in that the position of the deepest part or the position of the top part is continuously different in at least a part of the first element constituting the latent image part and / or the background part.

  Further, the present invention is characterized in that a plurality of arranged first elements are formed adjacent to each other.

  In the latent image pattern formed body of the present invention, the first and second elements of the concavo-convex shape constituting the pattern of the latent image and the background thereof are formed linearly, and the first element and the second element The formation density of the latent image can be increased, whereby the resolution and visibility of the latent image can be improved.

It is a figure which shows the latent image pattern formed body of this invention, and the observed latent image. It is a figure which shows a 1st pattern. It is a figure which shows the cross-sectional shape of a concave 1st element. It is a figure which shows the latent image part and background part of a 1st pattern. It is a figure which shows the state from which the position of the deepest part of the 1st element which comprises a latent image part and a background part differs. It is a figure which shows the cross-sectional shape of a concave 1st element. It is a figure which shows the cross-sectional shape of a convex-shaped 1st element. It is a figure which shows the state from which the position of the top part of the 1st element which comprises a latent image part and a background part differs. It is a figure which shows the cross-sectional shape of a convex-shaped 1st element. It is a figure which shows the example of the 1st element comprised with a drawing line. It is a figure which shows a 2nd pattern. It is a figure which shows the 2nd pattern formed inclining with respect to the 1st pattern. It is a figure which shows the example of the 2nd element comprised with a pixel. It is a figure which shows the state when arrangement | positioning of a 1st element and a 2nd element and a latent image are observed. It is a figure which shows a state when it observes from an observation point (L1). It is a figure which shows a state when it observes from an observation point (L2). It is a figure which shows a state when it observes from an observation point (L3). It is a figure which shows the latent-image image observed from an observation point (L3). It is a figure which shows arrangement | positioning of a 1st element and a 2nd element. It is a figure which shows a state when it observes from an observation point (L1). It is a figure which shows a state when it observes from an observation point (L2). It is a figure which shows arrangement | positioning of a 1st element and a 2nd element. It is a figure which shows a state when it observes from an observation point (L2). It is a figure which shows arrangement | positioning of a 1st element and a 2nd element. It is a figure which shows a state when it observes from an observation point (L2). It is a figure which shows the 1st pattern which differs in the position of the deepest part of the 1st element which comprises a latent image part. It is a figure which shows the state from which the position of the deepest part differs in the 1st element which comprises a latent image part. It is a figure which shows a state when it observes from an observation point (L2). It is a figure which shows the latent image of the latent image pattern formation body which the position of the deepest part of the 1st element which comprises a latent image part differs. It is a figure which shows the state which the 2nd element overlaps with the observation area | region of the 1st element which comprises a latent image part and a background part. It is a figure which shows the latent image image in which a latent image part and a background part are observed with the color of a 2nd element. It is a figure which shows a state when the latent image pattern formation body of Example 2 is observed from an observation point (L2). FIG. 6 is a diagram showing a latent image of a latent image pattern formed body of Example 2. FIG. 6 is a diagram showing a first pattern of a latent image pattern formed body in Example 3; FIG. 10 is a diagram showing a latent image pattern formed body of Example 5. It is a figure which shows the latent image image of the latent image pattern formation body of Example 5. FIG. FIG. 10 is a diagram showing a latent image pattern formed body of Example 7. It is a figure which shows the state which the position of the deepest part of the 1st element which comprises a latent image part changes continuously. FIG. 10 is a diagram showing a latent image of a latent image pattern formed body of Example 7.

  DESCRIPTION OF EMBODIMENTS Embodiments 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 within the scope of the technical idea described in the scope of claims.

  As shown in FIG. 1 (a), the latent image pattern formed body (2) of the present invention is formed on the base material (1) with a first element having a concave shape in the same color as the base material (1) or in a different color. 11), or the first pattern (10) is formed by arranging a plurality of convex first elements (11) in the same color as or different from the base material (1) to form the first pattern (10). A second pattern (20) is formed by arranging a plurality of second elements (21) having a color different from that of the first element (11). And when it observes from the front by arrangement | positioning of a 1st pattern (10) and a 2nd pattern (20), the 2nd pattern (20) shown in FIG.1 (b) is observed and observed from diagonally. In some cases, a portion where the color of the second element (21) is observed and a portion where the color of the second element (21) is not observed are generated, and the latent image (30) is formed as shown in FIG. Observed. Hereinafter, the detailed configuration of the latent image pattern formed body (2) will be described.

  In the present invention, the substrate (1) is not particularly limited, and paper, film, plastic, composite materials thereof and the like can be used.

  Next, the configuration of the first pattern (10) of the latent image pattern formed body (2) will be described.

(First pattern)
As shown in FIG. 2, the first pattern (10) is formed by arranging a plurality of first elements (11) in the first direction (F1) on the substrate (1). In the present invention, the “first direction (F1)” is a direction in which the first element (11) is disposed on the base material (1), and the first direction (F1) in FIG. ) Is a direction perpendicular to the long-side direction of the first element (11). Next, the first pattern (10) composed of the concave first element (11) and the first pattern (10) composed of the convex first element (11) will be described in order.

  FIG. 3 is a cross-sectional view taken along line YY ′ in FIG. 2, that is, a cross-sectional view of a plurality of first elements (11), and the first element (11) formed in a triangular concave shape. An example is shown. As shown in the enlarged view of FIG. 3, in the present invention, the deepest portion of the first element (11) formed in a concave shape is referred to as “deepest portion (R)”, and will be described below.

  In the present invention, when the first element (11) is formed in a concave shape, a plurality of first patterns (10) are provided in each of the first elements (11) arranged in the first direction. The latent image portion (4A) and the background portion (4B) shown in FIG. 4 are provided by partially changing the position of the concave deepest portion (R) in the first element (11). Note that the first pattern (10) shown in FIG. 4 has a latent image portion (4A) of the letter “A” of the alphabet and a background portion (4B) thereof. Subsequently, for the first element (11) constituting the latent image portion (4A) and the background portion (4B), a single first element (11) surrounded by a bold frame shown in FIG. 4 is used. explain.

FIG. 5A is a cross-sectional view of the first element (11) constituting the line MM ′ shown in FIG. 4, that is, the latent image portion (4A). In this description, as shown in FIG. 5A, in the first element (11) constituting the latent image portion (4A), the depth from the surface of the substrate (1) to the deepest portion (R) is expressed as “ This will be described below as “first depth (D _A )”.

FIG. 5B is a cross-sectional view of the NN ′ line shown in FIG. 4, that is, the first element 11 constituting the background portion 4A. In FIG. In order to compare the first element (11) constituting 4A) and the first element (11) constituting the background part (4B), the first element (11) constituting the latent image part (4A) is compared. It is indicated by a broken line. In this description, as shown in FIG. 5B, in the first element (11) constituting the background portion (4A), the depth from the surface of the base material (1) to the deepest portion (R) is expressed as “first This will be described below as “depth of 2 (D _B )”. And in the 1st pattern (10) of this invention, as shown in FIG.5 (b), when the 1st element (11) is formed in concave shape, in one 1st element (11) , The position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) and the first element (11) constituting the background portion (4B) are different. The position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) and the background portion (4B) is limited to the positions shown in FIGS. 5 (a) and 5 (b). Instead, as shown in FIG. 5C, the position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) and the background portion (4B) is as shown in FIG. The latent image portion (4A) and the position of the first element (11) constituting the background portion (4B) shown on the opposite side to the position of the latent image portion (4A), as shown in FIG. The deepest portion (R) of the first element (11) constituting the first element (11) is positioned at the center (illustrated by a one-dot chain line) of the line width (W ₁ ) of the first element (11) described later, The deepest portion (R) of the first element (11) constituting the portion (4B) is located at a different position or the deepest portion (R) of the first element (11) constituting the background portion (4B). But, The width of the predicate streaking (W ₁₎ in the center of, the deepest of the first elements of the latent image portion (4A) (11) (R) is, (not shown) different positions with respect to it It may be. As described above, in the present invention, as described above, the deepest part (R) of the first element (11) constituting the latent image part (4A) and the first element (R) constituting the background part (4B) ( The position of the deepest part (R) of 11) may be different. The positions of the deepest portions (R) of the first element (11) constituting the latent image portion (4A) and the first element (11) constituting the background portion (4B) described above will be described later. This is an example in which the distance from the center of the image line width (W ₁ ) of the first element (11) is formed at a constant position, and the latent image portion (4A) and / or the background portion (4B) are configured. In the first element (11), the position of the deepest portion (R) may be partially different. In the first element (11) constituting the latent image portion (4A) and / or the background portion (4B), the position of the deepest portion (R) may be continuously different. The first pattern (10) having such a configuration will be described later. In the present invention, the first depth (D _A ) and the second depth (D _B ) may be the same depth or different depths, but in FIGS. The state is shown in which the first depth (D _A ) and the second depth (D _B ) are the same depth.

  As shown in FIG. 6A, in addition to the triangle shown in FIG. 3, the position of the deepest portion (R) of the first element (11) formed in the concave shape can be changed. 6 (b), a pentagon shown in FIG. 6 (c), and a polygon (not shown) having a larger number of corners, and the position of the deepest portion (R) of each concave shape. Shown in the figure. As shown in FIG. 6B, the “position of the deepest portion (R)” when the deepest portion of the first element (11) is formed in a plane is the center of the portion formed in the plane. The position of On the other hand, the first element (11) formed in a concave shape is formed in a shape such as a rectangle or a square in which the position of the deepest portion (R) of the first element (11) cannot be changed. Can not. The concave shape of the first element (11) constituting the latent image portion (4A) and the background portion (4B) is the shape shown in FIG. 3 and FIGS. The shape is preferably the same shape (however, the depth is different). However, in the latent image observation principle described later, the latent image portion (4A) and the background portion (4B) have the second element (21). Different shapes may be used as long as the design causes a difference in visibility. The above is the configuration of the first pattern (10) including the concave first element (11).

  Next, the 1st pattern (10) which consists of a convex-shaped 1st element (11) is demonstrated.

  FIG. 7 is a cross-sectional view taken along line YY ′ in FIG. 2, that is, a cross-sectional view of a plurality of first elements (11), and the first element (11) formed in a triangular convex shape. An example is shown. As shown in the enlarged view of FIG. 7, in the present invention, the highest portion of the first element (11) formed in a convex shape is referred to as a “top (Q)” and will be described below.

  In the present invention, when the first element (11) is formed in a convex shape, a plurality of first patterns (10) are provided in each of the first elements (11) arranged in the first direction. By partially varying the position of the convex top (Q) within the first element (11), the latent image portion (4A) and the background portion (4B) shown in FIG. 4 are provided. Note that the design of the latent image portion (4A) will be described with the configuration of the letter “A” of the alphabet, as in the case where the first element (11) is formed in a concave shape. Subsequently, for the first element (11) constituting the latent image portion (4A) and the background portion (4B), a single first element (11) surrounded by a bold frame shown in FIG. 4 is used. explain.

FIG. 8A is a cross-sectional view of the first element (11) constituting the line MM ′ shown in FIG. 4, that is, the latent image portion (4A). In the present description, in the first element (11) constituting the latent image portion (4A), the height from the surface of the substrate (1) to the top (Q) is defined as “first altitude ( _HA )”. This is shown in FIG.

FIG. 8B is a sectional view of the first element (11) constituting the NN ′ line shown in FIG. 4, that is, the background portion (4B). In FIG. 8B, the latent image portion ( In order to compare the first element (11) constituting 4A) and the first element (11) constituting the background part (4B), the first element (11) constituting the latent image part (4A) is compared. It is indicated by a broken line. In this description, as shown in FIG. 8B, in the first element (11) constituting the background part (4A), the height from the surface of the base material (1) to the top part (Q) is defined as “first This will be described below as “2 altitude (H _B )”. And in the 1st pattern (10) of this invention, as shown in FIG.8 (b), when the 1st element (11) is formed in convex shape, in one 1st element (11) , The position of the top (Q) of the first element (11) constituting the latent image portion (4A) and the first element (11) constituting the background portion (4B) are different. Even when the first element (11) is formed in a convex shape, the top (Q) of the first element (11) constituting the latent image portion (4A) and the background are the same as in the concave shape described above. Since the position of the top part (Q) of the first element (11) constituting the part (4B) only needs to be different, the details are omitted, but the positional relationship shown in FIGS. It goes without saying that it can be taken. Similarly to the case where the first element (11) is formed in a concave shape, in the first element constituting the latent image portion (4A) and / or the background portion (4B), the top portion (Q) is further provided. The positions of the top portions (Q) may be continuously different in the first element (11) constituting the latent image portion (4A) and / or the background portion (4B). It is good also as a structure. In the present invention, the first height (H _A ) and the second height (H _B ) may be the same height or different heights, but in FIGS. The first altitude (H _A ) and the second altitude (H _B ) are the same height.

  As shown in FIG. 9A, in addition to the triangle shown in FIG. 7, the shape of the top part (Q) of the first element (11) formed in a convex shape can be made different. There are ellipses, trapezoids shown in FIG. 9 (b), pentagons shown in FIG. 9 (c), and polygons (not shown) having a larger number of corners, and the positions of the respective convex peaks (Q) are shown in the figure. Show. As shown in FIG. 9B, the “position of the top (Q)” when the highest portion of the first element (11) is formed in a plane is the center of the portion formed in the plane. Position. On the other hand, the first element (11) formed in a convex shape cannot be formed in a shape such as a rectangle or a square in which the position of the top (Q) of the first element (11) cannot be changed. . The convex shape of the first element (11) constituting the latent image portion (4A) and the background portion (4B) is the shape shown in FIG. 7 and FIGS. In the shape, it is preferable that the shape is the same (however, the heights are different). However, in the latent image observation principle described later, the latent image portion (4A) and the background portion (4B) have the second element (21). A different shape may be used as long as a difference in visibility occurs. The above is the configuration of the first pattern (10) including the convex first element (11).

  The first element (11) is composed of an image line. In the present invention, the “image line” means a straight line, a broken line, a wavy line, or the like.

  FIG. 10A shows an example in which a plurality of first elements (11) composed of straight lines are arranged. FIG. 10B shows an example in which a plurality of first elements (11) configured by broken lines are arranged. FIG. 10C shows an example in which a plurality of first elements (11) composed of wavy lines are arranged. Further, FIG. 10D shows an example in which a plurality of first elements (11) composed of an image line to which a design is given are arranged in the image line.

The width (W ₁ ) of the image line shown in FIG. 10 is not limited, but is preferably in the range of 10 μm to 1000 μm. Although the latent image can be observed even if the width (W ₁ ) of the image line is larger than 1000 μm, the first pattern (10) for forming the pattern of the latent image becomes large, and the precious printed matter is removed. This is not preferable because it is restricted by the design to be configured, for example, other printed designs. In addition, when the width (W ₁ ) of the image line is 10 μm or less, high alignment accuracy is required for the arrangement of the first element (11) and the second element (21), which will be described later, and the production is difficult. This is not preferable.

The width of the _first pitch (P ₁ ) shown in FIG. 10 is not particularly limited as long as it is wider than the width (W ₁ ) of the image line. The first element (11) is regularly formed at a constant pitch. Is placed. This is because if the first pitch (P ₁ ) is smaller than the width (W ₁ ) of the image line, the first elements (11) overlap each other, and the latent image portion (4A) and the background portion (4B) are separated. It is because it becomes impossible to form. When the latent image pattern formed body (2) of the present invention is formed on the precious printed matter as described above and the latent image is observed obliquely, the first pitch (P ₁ ) is 1000 μm or less. Is preferably formed. More preferably, the first pitch (P ₁ ) is formed in a range smaller than a value obtained by doubling the line width (W ₁ ) in the above-described range, that is, between the adjacent first elements (11). It is preferable to form with a narrow interval. More preferably, the first elements (11) are adjacent to each other, that is, the first pitch (P ₁ ) and the line width (W ₁ ) are made equal. In this way, when the first element (11) is formed by reducing the first pitch (P ₁ ) or formed so that the first elements (11) are adjacent to each other, the first element (11) is formed on the substrate (1). Since the formation density of the first element (11) can be increased, the resolution of the latent image can be increased, thereby improving the visibility of the latent image.

The first depth (D _A ) and the second depth (D _B ) shown in FIG. 5 are preferably formed in the range of 10 to 500 μm, and as described above, the first depth (D _A ) and The second depth (D _B ) may be the same depth or a different depth. Although the latent image can be observed even if the first depth (D _A ) and the second depth (D _B ) are smaller than 10 μm, the range of viewpoints through which the latent image can be observed is narrowed. It is not preferable. Moreover, although it is also possible to make 1st depth (D _A ) and 2nd depth (D _B ) larger than 500 μm, the thickness of the substrate (1) is limited and the processing efficiency is deteriorated. This is not preferable.

The first altitude (H _A ) and the second altitude (H _B ) shown in FIG. 8 are preferably formed in the range of 10 to 500 μm, and as described above, the first altitude (H _A ) and The second altitude (H _B ) may be the same height or a different height. Although the latent image can be observed even when the first altitude (H _A ) and the second altitude (H _B ) are smaller than 10 μm, the range of viewpoints through which the latent image can be observed is narrowed. It is not preferable. Further, the first altitude (H _A ) and the second altitude (H _B ) can be larger than 500 μm, but the thickness of the base material (1) is limited and the processing efficiency is deteriorated. This is not preferable.

  In the following description, an example in which the first element (11) is configured by a straight line will be described.

(Second pattern)
As shown in FIG. 11, the second pattern (20) is formed by arranging a plurality of second elements (21) in the second direction (F2) on the substrate (1). In the present invention, the “second direction (F2)” is a direction in which the second element (21) is disposed on the base material (1), and the second direction (F2) in FIG. ) Is a direction perpendicular to the long side direction of the second element (21). In the present invention, the first direction (F1) and the second direction (F2) may be the same direction, or the second direction may be different from the first direction. The second direction shown in FIG. 11 shows a state that is the same direction as the first direction shown in FIG. Subsequently, the second pattern (20) including the second elements (21) arranged in a plurality different from the first direction in the second direction will be described.

  In this case, as shown in FIG. 12A, the second element (21) is arranged in a second direction different from the first direction in which the first element (11) is arranged. Is done. In the present invention, when the first direction (F1) and the second direction (F2) are different, the angle (α) formed between the first direction and the second direction shown in FIG. 12B is 0 ± 10 degrees. It is formed in the range. A preferable range of the angle (α) formed by the first direction and the second direction is a range of 0 ± 1.5 degrees. This is because the smaller the absolute value of the angle (α) formed by the first direction and the second direction, the easier it is to visually recognize the pattern of the latent image. Note that if the angle (α) formed by the first direction and the second direction is greater than 10 degrees, fringes occur and the pattern of the latent image cannot be visually recognized.

Similarly to the first element (11) shown in FIG. 10, the second element (21) is constituted by an image line or a pixel shown in FIG. First, the second element (21) composed of image lines will be described. For the second element (21), the second pitch (P ₂ ) and the line width (W ₂ ) are used. In addition, when the 2nd element (21) is comprised with a drawing line, you may form the 2nd element (21) with a drawing line different from the 1st element (11).

The image element width (W ₂ ) of the second element (21) is at least larger than 10 μm, and the upper limit is formed in a range of 9/10 with respect to the _first pitch (P ₁ ). . If the line width (W ₂ ) of the second element (21) is larger than 9/10 with respect to the first pitch (P ₁ ), the entire first element (11) This is because the second element (21) overlaps with each other, and the contrast between the latent image portion (4A) and the background portion (4B) cannot be obtained and the latent image cannot be observed. Further, when the width (W ₂ ) of the image line of the second element (21) is smaller than 10 μm, the overlapping area between the first element (11) and the second element (21) is small, and thus the visibility of the latent image is reduced. This is because of a decrease.

The second pitch (P ₂ ) is formed with substantially the same size as the first pitch (P ₁ ). The substantially same size is a range of 4/5 to 6/5 with respect to the first pitch (P ₁ ). Preferably, the pitch is the same. This is described later because when the first pitch (P ₁ ) and the second pitch (P ₂ ) are the same, the first element (11) and the second element (21) always overlap at a constant interval. This is because it is easy to visually recognize the pattern of the latent image.

  Next, the second element (21) composed of pixels will be described. In the present invention, the “pixel” means a character, number, symbol, figure, mark, or the like having a predetermined shape, and the shape of the pixel is not particularly limited. When the second element (21) is composed of pixels, as shown in FIG. 13, the second element (21) is composed of pixels that constitute the second element (21) shown in FIG. It will be replaced.

  FIG. 13A shows an example in which a plurality of second elements (21) composed of pixels of characters are arranged. FIG. 13B shows an example in which a plurality of second elements (21) made up of numerical pixels are arranged. FIG. 13C shows an example in which a plurality of second elements (21) composed of symbols are arranged. FIG. 13D shows an example in which a plurality of second elements (21) each composed of a graphic pixel are arranged.

Second range of pitch (P ₂₎ shown in FIG. 13, the second element (21) is formed the same as the second pitch (P ₂₎ if composed of streaking. Further, the height (W ₂ ) of the pixel shown in FIG. 13 is formed in the same range as the width (W ₂ ) of the image line when the second element (21) is configured with the image line.

The pixel width (X ₂ ) of the second element (21) is formed in a range of 1000 μm or less. This is because, when the second element (21) is configured by pixels, the size of the pixel shape that is difficult to be observed with the naked eye is 1000 μm or less.

The pixel pitch (S ₂ ) may be appropriately adjusted according to the pixel width (X ₂ ) so that the second element (21) is observed as an image line when observed with the naked eye. However, the pixel pitch (S ₂ ) is formed smaller than the _second pitch (P ₂ ). This is because if the pixel pitch (S ₂ ) is larger than the _second pitch (P ₂ ), the second element (21) shown in FIG. 13 cannot be recognized as an image line. Further, the pixels are arranged such that at least the pixel pitch (S ₂ ) is larger than the pixel width (X ₂ ) so that the pixels do not overlap each other.

  A single second element (21) may be configured by combining the image line configuration described above and the pixel configuration. Moreover, it is good also as a structure of an image line, a pixel, or those composites for every 2nd element (21) arrange | positioned in multiple numbers.

  In the following description, an example in which the second element (21) is configured by a straight line will be described.

  The color of the second element (21) is not particularly limited as long as it is different from the color of the first element (11).

  The second element (21) having the above configuration includes at least a part of the first element (11) constituting the latent image portion (4A) and the first element (11) constituting the background portion (4B). It arrange | positions so that it may overlap with at least one part. At this time, when the latent image pattern formed body (2) is observed obliquely, the second element (21) overlaps at least the observation region of the first element (11) constituting the latent image portion (4A). , An arrangement that does not overlap the observation region of the second element (21) constituting the background portion (4B), at least overlaps the observation region of the first element (11) that constitutes the background portion (4B), and the latent image portion ( Arrangement that does not overlap the observation area of the second element (21) constituting 4A) or at least the first element (11) constituting the latent image part (4A) and the second element constituting the background part (4B) The arrangement overlaps the observation region (21), and the latent image (30) can be observed. The principle and observation area where the latent image (30) is observed when observed obliquely will be described later.

(Processing method of the first element and the second element)
As a method for forming the first element (11) having a concave shape, a processing method such as embossing, filling, or laser processing can be used. Moreover, as a formation method of a convex-shaped 1st element (11), well-known printing methods, such as intaglio printing, screen printing, and an inkjet, can be used. Moreover, the formation method of a 2nd element (21) can use well-known printing methods, such as offset printing, gravure printing, and inkjet printing, or laser processing. When the second element (21) is formed by printing, the second element (21) is made of ink, and when the second element (21) is formed by laser processing, the second element (21 ) Is formed by changing the color of the base material (11) on which the concave first element (11) is formed or the convex first element (11) by a laser. When the second element (21) is formed by laser processing, the extent to which the substrate (11) on which the concave first element (11) is formed or the convex first element (11) is not affected. It is necessary to adjust the laser output. In addition, when the first element (11) is formed by sweeping or laser processing, it is necessary to form the first element (11) before forming the second element (21). This is because when the first element (11) is formed by forming and laser processing after forming the second element (21), the second element (21) is formed when the first element (11) is formed. Because it will be destroyed.

Hereinafter, the observation principle of the latent image of the latent image pattern formed body (2) of the present invention will be described. First, a configuration in which the first element (11) is formed in a concave shape will be described. A plurality of the first elements (11) and the second elements (21) formed on the latent image pattern formed body (2) are arranged, but in the explanation of the observation principle, An example in which the element (11) and the second element (21) are arranged one by one will be described. An example in which the first depth (D _A ) and the second depth (D _B ) are formed at the same depth will be described.

  In FIG. 14A, the first element (11) and the second element (21) are arranged one by one, and the second element (21) is formed in a part of the first element (11). It is a top view which shows an example of the state which overlaps. In FIG. 14A, the first element (11) on the right side from the broken line constitutes the latent image part (4A), and the first element (11) on the left side from the broken line constitutes the background part (4B). It shows the state. Further, the position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) and the position of the deepest portion (R) of the first element (11) constituting the background portion (4B). Is indicated by a bold line. FIG. 14B is a diagram showing the position of the viewpoint when observing the latent image pattern formed body (2). In the present invention, the observation point (L1) indicates the position of the viewpoint when observed from directly above the substrate (1), and the observation point (L2) is a latent image formed on the substrate (1). For example, in the case of the first pattern (10) shown in FIG. 4, from the lower side of the first pattern (10) and from a direction oblique to the base material (1). The position of the viewpoint when observing the latent image is shown. Further, the observation point (L3) is directed in the direction opposite to the direction of the pattern formed on the substrate (1), for example, in the case of the first pattern (10) shown in FIG. 10) shows the position of the viewpoint when observing the latent image from the upper side of FIG. Hereinafter, the observation principle of the latent image of the latent image pattern formed body (2) having a configuration in which the first element (11) is formed in a concave shape will be described first when observed from the observation point (L2). The observation principle of the latent image when observed from the observation point (L3) will be described.

  FIG. 15A is a cross-sectional view taken along line M-M ′ shown in FIG. 14A, that is, the latent image portion (4A), and shows a state observed from the observation point (L1). At this time, when observed from directly above the base material (1) like the observation point (L1), the second element formed on the first element (11) constituting the latent image portion (4A). The entire element (21) can be seen. FIG. 15B is a cross-sectional view taken along the line N-N ′ shown in FIG. 14A, that is, the background portion (4B), and shows a state observed from the observation point (L1). At this time, when the background portion (4B) is observed from directly above the base material (1) like the observation point (L1), the second portion that overlaps the first element (11) constituting the background portion (4B). The entire element (21) can be observed. As described above, when the latent image pattern formed body (2) is observed from the observation point (L1), the second element (11) formed on the first element (11) constituting the latent image portion (4A). 21) and the second element (21) formed on the first element (11) constituting the background part (4B) can be observed in the same manner, and as a whole, the latent image part (4A) And the background part (4B) cannot be distinguished, and one second element (21) is observed. FIG. 14 is a diagram showing an example in which the first element (11) and the second element (21) are arranged one by one. The latent image pattern formed body (2) of the present invention is shown in FIG. Is observed from the observation point (L1), the second pattern (20) shown in FIG. 1B is observed in the color of the second element (21).

  FIG. 16A is a cross-sectional view taken along line M-M ′ shown in FIG. 14A, that is, the latent image portion (4A), and shows a state observed from the observation point (L2). In FIG. 16A, the incident angle of the observation point (L2) for observing the latent image portion (4A) with respect to the base material (1) is shown as “β”. At this time, in the second element (21) that overlaps the first element (11), the part that becomes the blind spot of the base material (1), that is, the part indicated by hatching in FIG. The element (21) cannot be observed, but the second element (21) can be observed in the remaining part. In the following description, in the case of observing the latent image (30), among the concave first element (11), the area that becomes a blind spot is referred to as a “dead spot area”, and the concave first element Of (11), the area excluding the blind spot area is referred to as “observation area”. The observation area and the blind spot area when observed from the observation point (L3) will be described later. The observation area and the blind spot area when observed from the observation point (L3) are the same as those observed from the observation point (L2). It replaces the observation area and the blind spot area. On the other hand, FIG. 16B is a cross-sectional view taken along the line N-N ′ shown in FIG. 14A, that is, the background portion (4B), and shows a state observed from the observation point (L2). In FIG.16 (b), the incident angle with respect to the base material (1) of the observation point (L2) which observes a background part (4B) is shown as "(beta) '", and also the concave 1st element ( The blind spot area of 11) is indicated by hatching. In the latent image pattern formed body (2) of the present invention, the incident angle (β ′) and the incident angle (β) when observing the latent image (30) are the same, but the latent image portion (4A) and Since the position of the deepest portion (R) of the first element (11) is different in the background portion (4B), the first portion constituting the latent image portion (4A) and the background portion (4B) as shown in FIG. Each element (11) has a different blind spot area, and a difference occurs in the visibility of the second element (21) between the latent image portion (4A) and the background portion (4B). And when the 1st element (11) and 2nd element (21) of arrangement | positioning shown in FIG.16 (b) are observed from the diagonal of an observation point (L2), 2nd element (21) is base material It cannot be observed because of the blind spot of (1).

  According to the observation principle described above, the arrangement shown in FIG. 14, that is, the second element (21) described above overlaps at least the observation area of the first element (11) constituting the latent image portion (4A), and the background. When the first element (11) and the second element (21) are observed from the observation point (L2) when arranged so as not to overlap the observation region of the second element (21) constituting the part (4B), Only the latent image portion (4A) is observed in the color of the second element (21). FIG. 14 is a diagram showing an example in which the first element (11) and the second element (21) are arranged one by one. The latent element of the present invention having the arrangement shown in FIG. When the image pattern formed body (2) is observed from the observation point (L2), the latent image portion (4A) is visually recognized by the color of the second element (21) as shown in FIG. The image (30) can be observed.

  In the present invention, the position of the viewpoint from which the latent image (30) can be observed, that is, the range of the incident angle (β) and the incident angle (β ′) of the observation point (L2) with respect to the base material (1) is one. It is not limited to one angle. Actually, when the latent image (30) is observed, the contrast between the latent image portion (4A) and the background portion (4B) is observed when observed at a predetermined incident angle (β) and incident angle (β ′). Although it is most obtained and the visibility of the latent image (30) is improved, the first element (11) constituting the latent image portion (4A) and the background portion (4B) even if the angle is different from the angle. If the visibility of the second element (21) formed in the position is different, the latent image (30) can be observed.

  Next, the observation principle of the latent image when observed from the observation point (L3) will be described. FIG. 17A is a cross-sectional view taken along line M-M ′ shown in FIG. 14A, that is, the latent image portion (4A), and shows a state observed from the observation point (L3). In FIG. 17A, the incident angle of the observation point (L3) for observing the latent image portion (4A) with respect to the base material (1) is illustrated as “β”. When observed from the observation point (L3), as described above, unlike the observation region and the blind spot region observed from the observation point (L2), the hatched region is the blind spot region in FIG. Thus, of the first element (11), the area excluding the blind spot area is the observation area. In the latent image portion (4A), the second element (21) overlapping the first element (11) cannot be observed as a blind spot of the substrate (1). On the other hand, FIG. 17B is a cross-sectional view taken along the line N-N ′ shown in FIG. 14A, that is, the background portion (4B), and shows a state observed from the observation point (L3). In FIG. 17B, the incident angle of the observation point (L2) for observing the background portion (4B) with respect to the base material (1) is illustrated as “β ′”. When observed from the observation point (L3), unlike the observation region and the blind spot region observed from the observation point (L2), the hatched area in FIG. Of the element (11), the area excluding the blind spot area is the observation area. And in the background part (4B), in the second element (21) overlapping the first element (11), the part that becomes the blind spot of the base material (1), that is, in FIG. In the region shown, the second element (21) cannot be observed, but the second element (21) can be observed in the remaining part. Thus, even when observed from the observation point (L3), the position of the deepest portion (R) of the first element (11) is different between the latent image portion (4A) and the background portion (4B). As shown in FIG. 4, the blind spot area is different in each of the first element (11) constituting the latent image portion (4A) and the background portion (4B), and the latent image portion (4A) and the background portion (4B) are second. Since the difference in the visibility of the element (21) occurs, the latent image (30) can be observed.

  According to the observation principle described above, the arrangement shown in FIG. 14, that is, the second element (21) as described above overlaps at least the observation area of the first element (11) constituting the background part (4B). The first element (11) and the second element (21) are observed from the observation point (L3) when arranged so as not to overlap the observation area of the second element (21) constituting the latent image portion (4A). In this case, only the background part (4B) is observed in the color of the second element (21). FIG. 14 shows an example in which the first element (11) and the second element (21) are arranged one by one, but the first element (11) shown in FIG. When the latent image pattern formed body (2) having the arrangement of the second element (21) is observed from the observation point (L3), as shown in FIG. The latent image (30) in which 4B) is visually recognized can be observed. When observed from the observation point (L3), the observed latent image (30) has the alphabet “A” in the reverse direction.

  In the foregoing, the observation point (L2) and the latent image (30) observed from the observation point (L3) have been described, but the latent image pattern formed body (1) in which the first element (11) is formed in a concave shape. When the observation point (L2) and / or the observation point (L3) is observed at the observation position, the position of the deepest part (R) is different, so that the latent image part (4A) and the background part (4B) Thus, a difference in visibility of the second element (21) occurs, and the latent image (30) is observed. However, in the present invention, whether or not the latent image (30) can be observed at both the observation point (L2) and the observation point (L3) depends on the first element (21) and the second element (21). This depends on the structure of the image line and its arrangement, and differs depending on the latent image pattern formed body (2). Therefore, in the following description, for the sake of convenience, the latent image observed when observed from the observation point (L2) (30) and its configuration will be described. Since the same applies to the case where the first element (11) is formed in a convex shape, which will be described later, the latent image (30) observed when observed from the observation point (L2) will be described. To do.

Next, the latent image observation principle of the latent image pattern formed body (2) formed by forming the first element (11) in a convex shape will be described. As in the description of the observation principle when the first element (11) is formed in a concave shape, the first element (11) and the second element (21) are arranged one by one. This will be explained with an example. An example in which the first altitude (H _A ) and the second altitude (H _B ) are formed at the same altitude will be described.

  FIG. 19 shows a state in which the first element (11) and the second element (21) are arranged one by one, and the second element (21) overlaps a part of the first element (11). It is a top view which shows an example. In FIG. 19, the first element (11) on the right side from the broken line constitutes the latent image portion (4A), and the first element (11) on the left side from the broken line constitutes the background portion (4B). Show. Further, the position of the top (Q) of the first element (11) constituting the latent image portion (4A) and the position of the top (Q) of the first element (11) constituting the background portion (4B) are bold lines. Is shown. Note that the position of the viewpoint when the latent image pattern formed body (2) is observed from directly above and the position of the viewpoint when observed from an oblique direction are the same as the position of the viewpoint shown in FIG. Is omitted.

  FIG. 20A is a cross-sectional view taken along line M-M ′ shown in FIG. 19, that is, the latent image portion (4A), and shows a state observed from the observation point (L1). At this time, when observed from directly above the base material (1) like the observation point (L1), the second element formed on the first element (11) constituting the latent image portion (4A). The entire element (21) can be seen. FIG. 20B is a cross-sectional view taken along the line N-N ′ shown in FIG. 19, that is, the background portion (4B), and shows a state observed from the observation point (L1). At this time, when the background portion (4B) is observed from directly above the base material (1) like the observation point (L1), the second portion that overlaps the first element (11) constituting the background portion (4B). The entire element (21) can be observed. As described above, when the latent image pattern formed body (2) is observed from the observation point (L1), the second element (11) formed on the first element (11) constituting the latent image portion (4A). 21) and the second element (21) formed on the first element (11) constituting the background part (4B) can be observed in the same manner, and as a whole, the latent image part (4A) And the background part (4B) cannot be distinguished, and one second element (21) is observed. FIG. 19 is a diagram showing an example in which the first element (11) and the second element (21) are arranged one by one, and the latent image pattern formed body (2) of the present invention. Is observed from the observation point (L1), the second pattern (20) shown in FIG. 1B is observed in the color of the second element (21).

  FIG. 21A is a cross-sectional view taken along line M-M ′ shown in FIG. 19, that is, the latent image portion (4A), and shows a state observed from the observation point (L2). In FIG. 21A, the incident angle of the observation point (L2) for observing the latent image portion (4A) with respect to the base material (1) is shown as “β”. At this time, of the second element (21) that overlaps the first element (11), the part that becomes the blind spot of the first element (11), that is, the part indicated by hatching in FIG. The second element (21) cannot be observed, but the rest can be observed. In the following description, in the case where the latent image (30) is observed from the observation point (L2), an area that becomes a blind spot in the convex first element (11) is also referred to as a “dead spot area”. In the convex first element (11), a region excluding the blind spot region is also referred to as an “observation region”. On the other hand, FIG. 21B is a cross-sectional view taken along the line N-N ′ shown in FIG. 19, that is, the background portion (4B), and shows a state observed from the observation point (L2). In FIG. 21 (b), the incident angle of the observation point (L2) for observing the background portion (4B) with respect to the base material (1) is shown as “β ′”, and the convex first element ( The blind spot area of 11) is indicated by hatching. In the latent image pattern formed body (2) of the present invention, the incident angle (β ′) and the incident angle (β) when observing the latent image (30) are the same, but the latent image portion (4A) and Since the position of the top part (Q) of the first element (11) is different in the background part (4B), the first element constituting the latent image part (4A) and the background part (4B) as shown in FIG. Each of (11) has a different blind spot area, and a difference occurs in the visibility of the second element (21) between the latent image portion (4A) and the background portion (4B). And when the 1st element (11) and 2nd element (21) of arrangement | positioning shown in FIG.21 (b) are observed from diagonally, the 2nd element (21) is a convex-shaped 1st element ( 11) The blind spot cannot be observed.

  When the first element (11) and the second element (21) having the arrangement shown in FIG. 19 are observed from the observation point (L2) according to the observation principle described above, only the latent image portion (4A) is the second element. Observed in the color of element (21). FIG. 19 is a diagram showing an example in which the first element (11) and the second element (21) are arranged one by one. The latent element of the present invention having the arrangement shown in FIG. When the image pattern formed body (2) is observed from the observation point (L2), the latent image portion (4A) is visually recognized by the color of the second element (21) as shown in FIG. The image (30) can be observed.

  Note that, also in the latent image pattern formed body (2) on which the convex first element (11) is formed, the position of the viewpoint at which the latent image (30) can be observed, that is, the base material of the observation point (L2) The range of the incident angle (β) and the incident angle (β ′) with respect to (1) is not limited to one angle. Actually, when the latent image (30) is observed, the contrast between the latent image portion (4A) and the background portion (4B) is observed when observed at a predetermined incident angle (β) and incident angle (β ′). Although it is most obtained and the visibility of the latent image (30) is improved, the first element (11) constituting the latent image portion (4A) and the background portion (4B) even if the angle is different from the angle. If the visibility of the second element (21) formed in the position is different, the latent image (30) can be observed.

Thus, in the latent image pattern formed body (2) of the present invention, in the first element (11), the position of the deepest portion (R) is different in the case of the concave shape, and in the case of the convex shape. Since the latent image portion (4A) and the background portion (4B) are formed at different positions of the top portion (Q) and the second element (21) overlaps, the latent image (30) can appear. The first element (11) is formed by reducing the _first pitch (P ₁ ) without changing the phase of the concavo-convex shape as in the latent image pattern forming body described in the conventional patent documents 1 and 2. Or it can form so that the 1st element (11) may adjoin. As a result, as described above, the formation density of the first elements (11) formed on the substrate (1) can be increased, so that the resolution of the latent image is increased, and thereby the visibility of the latent image is improved. Can be improved.

  As described above, the latent image observed with the latent image pattern formed body (2) of the present invention has the latent image portion (4A) or the background portion (4B) observed with the color of the second element (21). However, depending on the configuration and arrangement of the first element (11) and the second element (21) described in this specification, latent images having different visibility from the latent image (30) described above are used. An image (30) can be observed. Hereinafter, the configuration will be described with an example in which the first element (11) is formed in a concave shape.

  FIG. 22 is a plan view showing an example of an arrangement different from the arrangement of the first element (11) and the second element (21) shown in FIG. FIG. 23A is a cross-sectional view taken along line MM ′ shown in FIG. 22, and the second element overlapping the first element (11) with respect to the cross-sectional view shown in FIG. The position of (21) is different, and the area of the second element (21) overlapping the observation area of the first element (11) constituting the latent image portion (4A) is large. FIG. 23B is a cross-sectional view taken along the line NN ′ shown in FIG. 22, and the second element overlapping the first element (11) with respect to the cross-sectional view shown in FIG. The position of (21) is different, and the state where the second element (21) overlaps the blind spot area of the first element (11) constituting the background part (4B) is shown. When the first element (11) and the second element (21) formed in this way are observed from an oblique direction, the latent image portion (4A) is second in comparison with the configuration shown in FIG. As the range in which the element (21) can be observed becomes wider, it is observed in a dark color. In the background portion (4B), the second element (21) is not observed as a blind spot of the base material (1), as in the arrangement shown in FIG.

  FIG. 24 is a plan view showing an example of a different arrangement with respect to the arrangement of the first element (11) and the second element (21) shown in FIGS. FIG. 25A is a cross-sectional view taken along the line MM ′ shown in FIG. 24. The second element overlaps the first element (11) with respect to the cross-sectional view shown in FIG. The position of (21) is different and the area of the second element (21) overlapping the observation region of the first element (11) constituting the latent image portion (4A) is small. FIG. 25B is a cross-sectional view taken along the line NN ′ shown in FIG. 24. The first element (4B) constituting the background portion (4B) with respect to the cross-sectional view shown in FIG. 11 shows a state in which the position of the second element (21) overlapping with 11) is different. When the first element (11) and the second element (21) formed in this way are observed from an oblique direction, the latent image portion (4A) is second in comparison with the configuration shown in FIG. Since the range in which the element (21) can be observed is narrowed, it is observed in a light color. In the background portion (4B), the second element (21) is not observed as a blind spot of the base material (1), as in the arrangement shown in FIG.

  Thus, the density of the visible latent image (30) can be changed by the area of the second element (21) overlapping the observation region when observed from the observation point (L2).

Further, the first element (11) constituting the latent image portion (4A) and the first element (11) constituting the background portion (4B) described above are respectively the first element (11). There is an example in which the distance from the center of the width (W ₁ ) of the image line to the deepest part (R) is formed at a constant position. Subsequently, as described above, the latent image part (4A) and / or the background part are described. The case where the position of the deepest portion (R) is partially different in the first element (11) constituting the structure will be described. As an example, a first pattern (10) in which the position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) shown in FIG. 26 is partially different will be described.

  In the first pattern (10) shown in FIG. 26, the latent image portion (4A) has a ring shape, and the deepest portion (R) of the first element (11) in the left half and the right half of the latent image portion (4A). This is an example in which the positions of are different.

  FIG. 27A is a cross-sectional view of the first element (11) constituting the latent image portion (4A) on the line M-M ′ shown in FIG. 26, that is, the left half. FIG. 27B is a cross-sectional view of the first element (11) constituting the line LL ′ shown in FIG. 26, that is, the right half latent image portion (4A). Since the position of the deepest portion (R) is different from the first element (11) constituting 4A), the first element (11) constituting the left half latent image portion (4A) is shown. The cross section is indicated by a broken line. FIG. 27C is a sectional view of the N-N ′ line shown in FIG. 26, that is, the first element (11) constituting the background portion (4 B). The position of the deepest part (R) of the first element (11) constituting the background part (4B) shown in FIG. 27C is the first element (11) constituting the left half and the right half of the ring shape. It differs from the position of the deepest part (R).

  FIG. 28 shows the first element (11) constituting the latent image part (4A) and the first element (background part (4B) constituting the latent image part (4A) with respect to the first pattern (10) having the above structure. It is sectional drawing which shows an example of the arrangement | positioning which a 2nd element (21) overlaps with 11). FIG. 28A is a cross-sectional view of the first element 11 constituting the left half latent image portion 4A, and FIG. 28B is the right half latent image portion 4A. FIG. 28C is a cross-sectional view of the first element (11) constituting the background portion (4B). As shown in FIGS. 28A and 28B, the first element (11) constituting the latent image portion (4A) overlaps the observation area with the second element (21). When the image portion (4A) is observed obliquely, it is observed in the color of the second element (21). At this time, the position of the deepest portion (R) of the first element (11) constituting the left half latent image portion (4A) and the right half latent image portion (4B) is different. The visibility of (21) is different, and as shown in FIG. 29, the left half latent image portion (4A) having a large area of the second element (21) overlapping the observation region is dark and overlaps the observation region. A latent image (30) is observed in which the latent image portion (4A) in the right half having a small area of the element (21) is visually recognized. In addition, in this description, although the 1st element (11) which comprises a latent image part (4A) demonstrated the structure provided with two different deepest parts (R), in this invention, the 1st pattern (10) is The position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) may be further increased, or as described above, the first portion constituting the latent image portion (4A). The position of the deepest portion (R) of one element (11) may be continuously varied. As described above, by providing a configuration including a plurality of deepest portion (R) positions of the first element (11), the density range in which the latent image can be expressed can be expanded. The same applies to the first element (11) constituting the background part (4B).

  Subsequently, in the arrangement of the first element (11) and the second element (21), the first element (11) and the background part (4B) constituting at least the latent image part (4A) described above are constituted. The arrangement of the second element (21) overlapping the observation area will be described. An example of this arrangement is shown in FIG. In this case, as shown in FIG. 30, since the second element (21) overlaps the observation area of the first element (11) constituting the latent image portion (4A) and the background portion (4B), the observation is performed obliquely. The latent image portion (4A) and the background portion (4B) are observed in the color of the second element (21), but the latent image portion (4A) described above has two different deepest portions (R). In the same manner as the observation principle of the latent image (30) in the case of the constitution comprising the deepest portion (R) of each first element (11) constituting the latent image portion (4A) and the background portion (4B). ) Are different, one is dark and the other is visually recognized light, and the latent image (30) shown in FIG. 31 can be observed.

  As described above, the configuration described in the paragraph numbers 0073 to 0081 is possible even when the first element (11) has a convex shape, and similar effects can be obtained.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.

(Example 1) The first element has a concave shape
Example 1 is a latent image pattern formed body (2) in which the first element (11) is formed in a concave shape. Further, a paper material is used for the base material (1), the first direction and the second direction are the same direction, and the first depth (D _A ) and the second depth (D _B ) are formed at the same depth. The latent image pattern formed body (2). The latent image pattern formed body (2) of Example 1 will be described with reference to the drawings.

  In the latent image pattern formed body (2) of Example 1, a 200 μm paper material was used as the base material (1).

The first pattern (10) of the latent image pattern formed body (2) of Example 1 is as shown in FIG. 2, and the first element (11) constituting the first pattern (10) is imaged. The line width (W ₁ ) is a straight line of 100 μm, and a plurality of first pitches (P ₁ ) are 150 μm and arranged in the first direction. At this time, the first depth (D _A ) and the second depth (D _B ) are formed at 60 μm, and the position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) Is the position of 30 μm from the center of the width (W ₁ ) of the first element (11) to the lower side of the first pattern (10) shown in FIG. 2, and constitutes the background part (4B) The position of the deepest portion (R) of the first element (11) is 30 μm upward, and the latent image portion (4A) of the letter “A” of the alphabet shown in FIG. 5 and its background portion (4B) It was set as the structure which comprises. In addition, the 1st element (11) was formed by removing a part of base material (1) by laser processing.

The second pattern (21) of the latent image pattern formed body (2) of Example 1 is as shown in FIG. 11, and the second element (21) constituting the second pattern (20) is defined as an image. The line width (W ₂ ) is a straight line of 50 μm, the second pitch (P ₂ ) is 150 μm, and a plurality of lines are arranged in the second direction. At this time, the second element (21) was black and formed by an inkjet printer. The arrangement of the first element (11) and the second element (21) constituting the latent image portion (4A) is such that the second element (21) is a latent image as shown in FIG. The arrangement of the first element (11) and the second element (21) constituting the background part (4B) is arranged so as to overlap the observation region of the first element (11) constituting the part (4A). As shown to 16 (b), it was set as the arrangement | positioning which the 2nd element (21) overlaps with the blind spot area | region of the 1st element (11) which comprises a background part (4B).

  When the latent image pattern formed body (2) of Example 1 configured as described above is observed from directly above, the second pattern (20) shown in FIG. 1 (b) is observed, and is oblique as shown in FIG. When observed from the viewpoint, the visibility of the second element (21) is different in the latent image part (4A) and the background part (4B) formed by the first element (11) where the position of the deepest part (R) is different. As a result, the latent image (30) shown in FIG. 1 (c) was observed.

(Example 2)
Example 2 is a latent image pattern formed body (2) in which the first element (11) is formed in a convex shape as compared with Example 1. In addition, the second element (21) overlaps the blind spot area of the first element (11) constituting the latent image part (4A), and the observation area of the first element (11) constituting the background part (4B). The latent image pattern formed body (2) is overlapped with the second element (21). The latent image pattern formed body (2) of the second embodiment will be described with respect to differences from the first embodiment.

The first element (11) constituting the first pattern (10) of Example 2 was formed by intaglio printing with a first height (H _A ) and a second height (H _B ) of 50 μm. The position of the top (Q) of the first element (11) constituting the latent image portion (4A) is shown in FIG. 2 from the center of the width (W ₁ ) of the image line of the first element (11). The position of 30 μm was set in the upper direction of the first pattern (10), and the position of the top (Q) of the first element (11) constituting the background part (4B) was set at a position of 30 μm downward. In addition, the arrangement of the first element (11) and the second element (21) constituting the latent image portion (4A) is the same as the arrangement of the latent image portion (4A) as shown in FIG. It arrange | positioned so that the 2nd element (21) may overlap with the blind spot area | region of the 1 element (11). Also, the arrangement of the first element (11) and the second element (21) constituting the background part (4B) is the first part constituting the background part (4B) as shown in FIG. It arrange | positioned so that the 2nd element (21) may overlap with the observation area | region of an element (11).

  When the latent image pattern formed body (2) of Example 2 configured as described above is observed from an oblique direction, the negative-positive inverted latent image shown in FIG. 33 with respect to the latent image (30) shown in FIG. 1 (c). (30) was observed.

(Example 3)
In the third embodiment, the first element (11) is adjacent to the first embodiment, that is, the latent image pattern formation in which the first pitch (P ₁ ) and the line width (W ₁ ) are equal. Is the body. Further, the latent image pattern formed body (2) has the same first pitch (P ₁ ) and second pitch (P ₂ ). The latent image pattern formed body (2) of the third embodiment will be described for differences from the first embodiment.

The first pattern (10) of the latent image pattern formed body (2) of Example 3 is as shown in FIG. 34, and the first element (11) constituting the first pattern (10) is defined as an image. The line width (W ₁ ) is a straight line having a thickness of 100 μm, and the first pitch (P ₁ ) is 100 μm. Note that the position of the deepest portion (R) of each of the first elements (11) constituting the latent image portion (4A) and the background portion (4B) is the same as that of the first embodiment, and the star shown in FIG. A latent image portion (4A) of the mold and a background portion (4B) thereof are provided. In addition, the second element (21) constituting the second pattern (20) is formed by a straight line having an image line width (W ₂ ) of 50 μm, and the second pitch (P ₂ ) is formed by 100 μm. did.

  The latent image pattern formed body (2) of Example 3 configured as described above is different from Example 1 in that the first element (11) and the second element (21) formed on the substrate (1). As a result, the latent image (30) with good resolution and visibility was observed when observed from an oblique direction.

(Example 4)
Example 4 is a latent image pattern formed body (2) in which the position of the second element (21) overlapping the first element (11) is different from that of Example 1. Further, the second element (21) overlaps the observation area of the first element (11) constituting the latent image part (4A) and the observation area of the first element (11) constituting the background part (4B). It is a latent image pattern formation body (2). Regarding the latent image pattern formed body (2) of the fourth embodiment, differences from the first embodiment will be described.

  FIG. 30 shows a state in which the second element (21) overlaps the observation regions of the first element (11) constituting the latent image portion (4A) and the background portion (4B) in the fourth embodiment. FIG. 30A shows a second element (21) overlapping the first element (11) constituting the latent image portion (4A). As described above, the position of the second element (21) that overlaps the first element (11) is different, and overlaps the observation region of the first element (11) with respect to the arrangement shown in FIG. The area of the second element (21) is increased, and accordingly, the area of the second element (21) overlapping the blind spot area is decreased. FIG. 30B shows a second element (21) that overlaps the first element (11) constituting the background part (4B). As described above, the position of the second element (21) overlapping the first element (11) is different, and the second element (21) overlaps the first region (11) in the observation region with respect to the arrangement shown in FIG. The two elements (21) overlap, and accordingly, the area of the second element (21) overlapping the blind spot area is reduced.

  When the latent image pattern formed body (2) having the above configuration is observed obliquely, the second element (in the observation region of the first element (21) constituting the latent image portion (4A) and the background portion (4B)) 21) are overlapped, so that both are observed in the color of the second element (21), but the latent image portion (4A) and the background portion (4B) formed by changing the position of the deepest portion (R). ), As shown in FIG. 30, the area of the second element (21) overlapping the observation area of the first element (11) constituting each is different, and the area of the second element (21) overlapping the observation area is different. The latent image portion (4A) having a large area is dark and the background portion (4B) having a small area of the second element (21) overlapping the observation region is visually recognized light, and the latent image (30) shown in FIG. 31 is observed. It was.

(Example 5)
Example 5 is a latent image pattern formed body (2) in which the first direction and the second direction are different from the latent image pattern formed body (2) of Example 1. Regarding the latent image pattern formed body (2) of the fifth embodiment, differences from the first embodiment will be described.

  In Example 5, the second pattern (20) was formed by arranging a plurality of second elements (21) in a second direction different from the first direction. At this time, the second direction was different from the first direction once. FIG. 35 is a plan view showing a state where the second pattern (20) overlaps the first pattern (10). As shown in FIG. 35, by making the second direction different from the first direction, the second element is formed on the first element (11) constituting the latent image portion (4A) and the background portion (4B). Although the first element (11) constituting the same latent image part (4A) or the first element (11) constituting the same background part (4B) is partially The second element (21) overlaps with different areas.

  When the latent image pattern formed body (2) having the above configuration is observed obliquely, the second element that overlaps the observation region of the first element (11) that constitutes the latent image portion (4A) and the background portion (4B). As the area of (21) partially changes, the latent image (30) with gradation shown in FIG. 36 was observed.

(Example 6)
In the sixth embodiment, the position of the deepest portion (R) is partially in the first element (11) constituting the latent image portion (4A) with respect to the latent image pattern formed body (2) of the first embodiment. The latent image pattern forming body (2) is different. The latent image pattern formed body (2) of the sixth embodiment will be described with respect to differences from the first embodiment.

In Example 6, the first pattern (10) has a ring-shaped latent image portion (4A) and a background portion (4B) as shown in FIG. At this time, the position of the deepest portion (R) of the first element (11) is made different between the left half and the right half of the latent image portion (4A), and the first half constituting the left half of the latent image portion (4A) is formed. The position of the deepest part (R) of the element (11) is the direction from the center of the line width (W ₁ ) of the first element (11) to the lower side of the first pattern (10) shown in FIG. The position was 30 μm. The position of the deepest portion (R) of the first element (11) constituting the right half of the latent image portion (4A) is the center of the line width (W ₁ ) of the first element (11). The position. The position of the deepest portion (R) of the first element (11) constituting the background portion (4B) is shown in FIG. 26 from the center of the line width (W ₁ ) of the first element (11). The position was 30 μm in the upper direction of the first pattern (10) shown. The second element (21) overlaps the observation region of the first element (11) constituting the latent image portion (4A), and the blind spot of the first element (11) constituting the background portion (4B). Arranged to overlap the area.

  When the latent image pattern formed body (2) having the above configuration is observed from an oblique direction, the second element (21) overlaps the observation area of the latent image portion (4A). Although observed in the color of the element (21), the area of the second element (21) overlapping the observation area of the first element (11) constituting the left half of the latent image portion (4A) Since it is larger than the area of the second element (21) that overlaps the observation area of the first element (11) that constitutes, as shown in FIG. 29, the left half of the latent image portion (4A) is dark and the left half A latent image (30) with a reduced thickness is observed.

(Example 7)
Example 7 is a latent image pattern formed body obtained by continuously changing the position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) with respect to Example 1. 2). The latent image pattern formed body (2) of the seventh embodiment will be described with respect to differences from the first embodiment.

As shown in FIG. 37, the first pattern of Example 7 was configured to have a circular latent image portion (4A) and its background portion (4B). FIG. 38 (a) is a plan view of the first element (11) in the portion surrounded by the two-dot chain line shown in FIG. 37, and the broken line shown in FIG. 38 (a) is the first element (11). The position of the deepest part (R) is shown. In FIG. 38A, the position of the deepest portion (R) of the first element (11) constituting the left end portion of the latent image portion (4A) is the width (W) of the image line of the first element (11). ₁ ) from the center to the lower side of the first pattern (10) shown in FIG. 37, the deepest portion of the first element (11) constituting the right end portion of the latent image portion (4A) The position of (R) is the position of the center of the line width (W ₁ ) of the first element (11), and in the meantime, the position of the deepest part (R) is continuously set so that both ends are connected by a straight line. Made them different. Further, the position of the deepest portion (R) of the first element (11) constituting the background portion (4B) is shown in FIG. 37 from the center of the line width (W ₁ ) of the first element (11). The position was 30 μm in the upper direction of the first pattern (10) shown.

FIG. 38 (b) is a plan view of the first element (11) in the portion surrounded by the one-dot chain line shown in FIG. 37, and the broken line shown in FIG. 38 (b) is the first element (11). The position of the deepest part (R) is shown. In Example 7, the position of the deepest portion (R) of the first element (11) constituting the latent image portion (4A) is the same in the vertical direction with respect to the plurality of arranged first elements (11). For example, the position of the deepest portion (R) of each first element (11) located on the line PP ′ is the distance from the center of the width (W ₁ ) of the image line of the first element (11). Were formed to be the same. The second element (21) overlaps the observation region of the first element (11) constituting the latent image portion (4A), and the blind spot of the first element (11) constituting the background portion (4B). Arranged to overlap the area.

  When the latent image pattern formed body (2) having the above configuration is observed obliquely, the second element (21) overlaps the observable region of the first element (11) constituting the latent image portion (4A). Therefore, the latent image portion (4A) was observed in the color of the second element (21). At this time, since the area of the second element (21) that overlaps the observation region decreases from the left side to the right side of the first element (11) constituting the circular shape, the density increases from the left side to the right side as shown in FIG. A latent image (30) with a varying was observed.

DESCRIPTION OF SYMBOLS 1 Base material 2 Latent image pattern formation body 4A Latent image part 4B Background part 10 1st pattern 11 1st element 20 2nd pattern 21 2nd element 30 Latent image F1 1st direction F2 2nd direction W ₁ Stroke width (first element)
S ₁ First pitch D _A First depth W ₂ Stroke width, pixel height (second element)
Viewpoint when observed from an oblique direction with respect to S ₂ second aspect L2 substrate when viewed from directly above the pitch D _B second depth L1 substrate width S ₂ pixel pitch X ₂ pixels L3 Viewpoint β when observed from a direction oblique to the substrate β Angle of incidence of the viewpoint with respect to the substrate β ′ Angle of incidence of the viewpoint with respect to the substrate

Claims (6)

A first pattern in which a plurality of concave or convex first elements of the same color or different colors as the base material are arranged in a first direction on at least a part of the base material and the first element A second pattern is formed by arranging a plurality of second elements of different colors in the second direction, and the first pattern is the position of the deepest portion in the plurality of arranged first elements or At least a part of the first element constituting the latent image part and at least a part of the first element constituting the background part, which is divided into a latent image part and a background part by partially different positions of the top part When the second element overlaps and is observed from directly above the base material, the second pattern is observed, and when the base material is observed from an oblique direction, the first element constituting the latent image portion and the background part The position of the deepest part or the top part of the first element constituting the A latent image pattern formed body in which a latent image is observed with different visibility between the first element constituting the latent image portion and the second element overlapping the first element constituting the background portion. .   The latent image pattern formed body according to claim 1, wherein the first element is an image line.   The latent image pattern forming body according to claim 1, wherein the second element is an image line and / or a pixel.   4. The first element constituting the latent image part and / or the background part is characterized in that the position of the deepest part or the position of the top part is partially different in one first element. The latent image pattern formed body according to any one of the above.   The position of the deepest part or the position of the top part is continuously different in at least a part of the first element constituting the latent image part and / or the background part. Item 2. The latent image pattern formed article according to item 1.   6. The latent image pattern formed body according to claim 1, wherein the plurality of first elements arranged adjacent to each other are formed adjacent to each other.

Images