KR102632833B1 - printed media for preventing counterfeit - Google Patents

Abstract

A counterfeit comprising a first printed material sheet of a certain thickness made of transparent material, a first printed pattern formed on the first side of the first printed material sheet, and a second printed pattern formed below and spaced apart by at least the thickness of the first printed material sheet. As a preventing medium, the first printing pattern and the second printing pattern overlap as the first printing pattern is moved relative to the second printing pattern parallel to the surface of the first printing object sheet. It is made so that the degree changes periodically, and in the second printing pattern, parallel lines forming the pattern of the corresponding part across the differentiation area or area corresponding to the shape to be displayed, or two-dimensional closed curve figures periodically repeated are shown above. An anti-counterfeiting medium is disclosed, which is characterized in that it is formed to have a pattern change such as removing a part, moving a certain distance, printing the whole, or not printing the whole based on the relative moving direction.

Description

{printed media for preventing counterfeit}

The present invention relates to an anti-counterfeiting medium, and more specifically, to an anti-counterfeiting medium that can have functionality such as security and anti-counterfeiting just by combining simple flat printing.

Forgery or security can always be a problem in documents or securities whose contents are displayed on paper or other media (hereinafter, the term 'forgery' will be used simply to encompass security issues). Previously, in order to prevent counterfeiting, technologies with various anti-counterfeiting effects, such as watermarks, silver lines, security windows, or latent images, were applied to media along with printed content.

Silver coins are one of the important security elements implemented in security paper to prevent counterfeiting of sheets. Generally, due to differences in thickness and density of paper or fiber, parts that transmit little light appear dark, and parts that transmit a lot of light appear dark. The silver is made to look bright and the shape of the silver coin is changed or revealed by the business card car. As a method of producing silver coins, a method of producing silver coins using a laser is known in Republic of Korea Patent No. 10-1213208.

In addition, there are many known technologies that use special inks such as various thermochromic or photochromic inks to cause patterns to appear or change color under specific light or at specific temperatures. Republic of Korea Patent No. 10-0824286 discloses a technology related to transfer paper using discoloration characteristics.

Latent image technology is generally formed by intaglio printing or is a technology that allows different types of images to be recognized depending on the viewing angle by adjusting the line width or shape of the lines forming the shape. Japanese Patent Publication No. 2009-214304 discloses a technology for forming a latent image pattern by printing on a raised pattern.

In addition, special optically variable ink is used to create the effect of showing different colors depending on the viewing angle.

However, the above-mentioned anti-counterfeiting effects are achieved by using expensive special inks such as thermochromic, photochromic, or optically variable inks, by going through complex processes such as intaglio printing or screen printing, by using special fiber materials, or by using sheet There are problems with high material costs or complicated production processes, such as injecting special effects at the production stage.

Republic of Korea Patent Registration No. 10-2034873 discloses an anti-counterfeiting sheet and its manufacturing method that utilizes visibility characteristics depending on the viewing angle, direction, and distance of the object. More specifically, this includes a first substrate having a first pattern printed on one side, and a light-transmissive second substrate having one side laminated with the side of the first substrate on which the first pattern is printed and the second pattern printed on the other side. And, the first pattern includes a plurality of first elements and a first margin, and the second pattern includes a plurality of second elements and a second margin, and the entirety of the first element when viewed from directly above the second element. Or, part of it is hidden by the second element, and the first pattern and the first element are exposed through the second margin at a specific viewing angle, but the first element includes sub-elements of different colors, so that the first pattern is oriented It is recognized as a different color depending on the color.

However, this configuration assumes color printing, and when the sizes of the first and second patterns are different from each other, there is a problem that it is not easy to align them vertically in the correct position.

Republic of Korea Patent No. 10-1806391 also discloses an anti-counterfeiting sheet made by overlapping a first sheet with a first pattern on the upper surface and a second sheet with a second pattern on the upper surface underneath it, but even in this case, the second sheet There is a problem that there are limitations such as the pattern must have a silver coin that is recognized when viewed from the back, or the second pattern must be completely obscured by the first pattern in the sheet normal direction, which can make manufacturing difficult.

Republic of Korea Patent Registration No. 10-1213208 Republic of Korea Patent Registration No. 10-0824286 Japanese Patent Publication No. 2009-214304 Republic of Korea Patent Registration No. 10-2034873 Republic of Korea Patent No. 10-1806391

The present invention is intended to solve problems such as difficulties or limitations in manufacturing and implementing anti-counterfeiting media, such as the above-described conventional anti-counterfeiting sheets, and cost increase factors, and can easily prevent counterfeiting with a relatively simple combination of general printing, such as flat printing, The purpose is to provide an anti-counterfeiting medium that can perform the functions of and does not have problems such as increased costs due to the use of special materials or adoption of special printing techniques.

The anti-counterfeiting medium of the present invention can be used by itself or can be used by combining it with a separate object, such as a document, stock, card, etc.

The anti-counterfeiting medium of the present invention for achieving the above purpose is

A first printed material sheet of a certain thickness made of transparent material, a first printed pattern formed on the first surface (upper surface) of the first printed material sheet, and a second printed pattern formed below and spaced apart by at least the thickness of the first printed material sheet. As an anti-counterfeiting medium equipped with

The first printing pattern and the second printing pattern are formed by moving the first printing pattern relative to the second printing pattern in at least one direction on a two-dimensional plane parallel to the surface of the first printing object sheet. 2 The degree of overlap of the printing patterns changes periodically,

In the second printing pattern, parallel lines or two-dimensional closed curve shapes that are periodically arranged to form a pattern of the corresponding part across the differentiated area or area corresponding to the shape of the symbol, character, or figure to be displayed are used based on the relative movement direction. If you remove a part, move it a certain distance, or in special cases where the line width and spacing are the same, you can change the pattern such as reversing the printed and non-printed parts, printing the whole thing, or not printing the whole thing. It is characterized by being formed as follows.

In the anti-counterfeiting medium of the present invention, the second printed pattern may be formed on the second side, that is, the lower side, which is the opposite side of the first side of the first printed material sheet. That is, the first and second printed patterns may be formed on opposite surfaces of the same transparent first printed material sheet.

In the anti-counterfeiting medium of the present invention, the second printing pattern is preferably printed on the lower part of the first printed material sheet, but may be separately formed on the upper or lower surface of the second printed material sheet located below. At this time, printing on the lower surface occurs when the second printed material sheet is transparent. Depending on the thickness of the printed material sheet, the viewing angle at which the anti-counterfeiting medium is effective may vary. The thicker the object to be printed, the larger and easier it is to observe the effect of the anti-counterfeiting medium. Comparatively, in the case of the reverse material, the observation angle becomes smaller and the effect decreases. If necessary, the second printing pattern is fabricated by printing the pattern on the underside of the second printing material sheet using a transparent second printing material sheet different from the first printing material, thereby increasing the thickness of the transparent material between the first printing pattern and the second printing material. It can complement the prevention media effect.

In the anti-counterfeiting medium of the present invention, the first print pattern and the second print pattern may be made up of a plurality of lines of a certain line width spaced apart at regular intervals, and the second print pattern may be the first print pattern except for the shape portion to be displayed. It is desirable to form the same pattern as the pattern. At this time, the lines can be straight or curved, and it is important that they are parallel to each other and maintain a certain line width and a certain spacing.

In terms of effectiveness, it is preferable that the first printing pattern is located at the top and the second printing pattern is located at the bottom, but in some cases, the positions of the first printing pattern at the top and the second printing pattern at the bottom may be exchanged.

In the anti-counterfeiting medium of the present invention, the first printing pattern and the second printing pattern may be formed so that polygonal printing portions and printed portions are alternately positioned. At this time, preferably, the polygons and dividing lines may be continuous triangles, squares, rhombuses, parallelograms, hexagons, or regular repetitive combinations of different polygons so as to fill the entire sheet without any gaps. However, of course, patterns arranged regularly on the plane of circles, ellipses, or other two-dimensional closed curve geometric patterns are also possible.

In the anti-counterfeiting medium of the present invention, the thickness of the sheet, the thickness of pattern printing, and the line width or size of the printed and repeated portion can be varied to vary the field of view or viewing angle in one direction moving from the front.

According to the present invention, problems such as difficulties or limitations in manufacturing and implementing anti-counterfeiting media, such as conventional anti-counterfeiting sheets, and cost increase factors are solved or improved, and the anti-counterfeiting function can be easily performed with a relatively simple combination of general printing methods. However, there are not many factors that increase costs due to the use of special materials or adoption of special printing techniques, so the overall production cost of anti-counterfeit media can be reduced, and therefore, the cost of creating or producing anti-counterfeit objects can also be reduced.

Figure 1 is an example showing the general principles of security printing media, a cross-sectional view showing a transparent printed material with line patterns printed on both sides cut perpendicular to the line patterns;
Figure 2 is a cross-sectional view illustrating the main viewing angles at which the effect varies when viewing a security print medium like Figure 1;
Figure 3 is a comparative diagram showing the shape of the security print media like Figure 1 when viewed from each viewing angle of Figure 2;
Figure 4 is a comparative diagram showing the contrast effect of security printing media such as Figure 1, especially when viewed at a viewing angle of 90 degrees and a viewing angle of 45 degrees,
Figure 5 is a plan view showing a first printed material sheet and a first printed pattern constituting an embodiment of the present invention;
Figure 6 is a plan view showing a second printed material sheet and a second printing pattern constituting an embodiment of the present invention;
Figure 7 is a conceptual cross-sectional view for explaining the security printing effect in a security printing medium in which the first printing object of Figure 5 and the second printing object of Figure 6 overlap according to an embodiment of the present invention;
Figure 8 is a plan view showing a second printed material sheet and a second printing pattern constituting Example 2 of the present invention;
Figure 9 is a conceptual cross-sectional view for explaining the security printing effect in a security printing medium formed by overlapping the first printed object of Figure 5 and the second printed object of Figure 8 according to Embodiment 2 of the present invention;
Figure 10 is a plan view showing a second printed material sheet and a second printing pattern constituting Example 3 of the present invention;
Figure 11 is a conceptual cross-sectional view for explaining the security printing effect in a security printing medium in which the first printing object of Figure 5 and the second printing object of Figure 10 overlap according to the third embodiment of the present invention;
Figure 12 is a plan view showing a second printed material sheet and a second printing pattern constituting Example 4 of the present invention;
Figure 13 illustrates the security printing effect in a security printing medium in which the first printing body of Figure 5 and the second printing body of Figure 12 overlap according to Example 4 of the present invention.
Figure 14 is a plan view showing a first printed material sheet and a first printed pattern constituting Example 5 of the present invention;
Figure 15 is a plan view showing a second printed material sheet and a second printing pattern constituting Example 5 of the present invention;
Figure 16 is a plan view showing a second printed material sheet and a second printing pattern constituting Example 6 of the present invention;
Figure 17 is a plan view showing a second printed material sheet and a second printing pattern constituting Example 7 of the present invention;
Figure 18 is a perspective view showing a first printed material sheet and a first printing pattern constituting Example 8 of the present invention;
19 to 21 are plan views showing cases where concentric circles, squares, and triangles are used as basic patterns or basic shapes forming the first printing pattern constituting other embodiments of the present invention, respectively;
Figures 22 and 23 are plan views showing cases of using triangles and diamonds, respectively, as basic shapes arranged periodically laterally to form the first printing pattern constituting other embodiments of the present invention.

Hereinafter, the present invention will be described in more detail through specific examples with reference to the drawings.

First, to explain the basic principle used in the present invention, the present invention uses the change and interference form that occurs when the upper and lower two patterns overlap and unfold due to the difference in thickness of the transparent material to prevent counterfeiting. A line pattern (or closed curve) Two-dimensional flat patterns (such as shapes) have a thin space and interfere with each other to create shapes or colors or disappear.

Any material that can be printed is possible, including plastics such as PVC, PET, PE, and PC, and inorganic materials such as glass. The two patterns mentioned above can be printed on the front and back of the transparent material sheet. Depending on the viewing angle, hidden pictures, letters, or colors can appear when they overlap or disperse.

This content can be understood in more detail by referring to Figures 1 to 4 below.

Figure 1 shows a cross-section of a printed object with line patterns printed on both sides cut perpendicular to the lines.

Here, A is the front (top), B is the back (bottom), D is the thickness of the transparent material to be printed, and H is the thickness of the printing ink. In addition, E is the line width, more specifically AE is the line width of the front pattern, BE is the line width of the back pattern, F is the line spacing, more specifically AF is the line spacing of the front pattern, BF is the line spacing of the back pattern, AP represents the front print, BP represents the back print, and θ represents the angle at which the observer views the printed object.

Of course, the line width, line spacing, and thickness of the printed material are generally different from each other, but here, for convenience of understanding, the line width and line spacing of the printed lines are the same, and the thickness (D) of the printed material is also assumed to be the same as the line width. This can be expressed in an equation as follows:

AE = AF = BE = BF = D

The above equation is the equation that can most ideally observe the effect of this invention, and when the thickness (D) of the printed material is greater than the line width (E), the angle at which the effect of this technique appears (the observation angle at which hidden pictures, characters, or colors appear) ) is closer to the vertical (90°), and if it is smaller than the thickness of the line, it appears closer to the horizontal (0°). The width of the line used in this invention is, for example, 0.1 to 1.5 mm, and according to the above equation, the thicker the line, the thicker the printed material must be. On the other hand, since the general ink thickness (H) is 0.05 ~ 0.001 mm (1μm) in the case of offset printing, this thickness can be ignored when observing.

Referring to Figure 2, the angle to be observed is the angle between one side of the surface of the printed object and the line of sight. Observation is possible at any natural angle between 0 and 180 degrees, but the observed angle is the angle between one side of the surface of the printed object and the line of sight. However, the observed angle is the angle between one side of the surface of the printed object and the line of sight. However, the observed angle is the angle between one side of the surface of the printed object and the line of sight. If the refractive index is not greatly considered, one side of the front linewidth and the other side of the adjacent linewidth on the back exactly overlap each other and the entire surface appears half black at an angle of 26.6°, located at the midpoint between one side of the front linewidth and the adjacent linewidth on the back, and the margin 33.7°, which is an angle where only half of the line width appears black; one side of the front line width and the other side of the adjacent line width on the back exactly overlap each other; and an angle of 45°, where the entire side appears black, is placed at the midpoint between one side of the line width on the front and the adjacent margin on the back, 63.4°, which is the angle where only half of the blank space appears black; 90°, which is the angle where the line width of the front line and the line width of the back line completely overlap, making the entire surface appear half black; 116.6°, 135°, where only the above angle and direction are changed, and the effect is reversed again; 146.3°, 153.4°, etc. can be used as a standard for observation. At observation angles of 26.6° or less or 153.4° or more, more detailed changes occur in theory, but when actually observed with the eye, the angle visible is so narrow that there is a limit to color differentiation, so the minimum observation angle is 26.6° or more and the maximum observation angle is 153.4° or less. It is desirable to do so.

Figure 3 shows the target anti-counterfeiting medium when viewed from several important viewing angles, as shown in Figure 2, in which the same horizontal line pattern on the upper and lower surfaces of the transparent first printing medium is formed to completely overlap when viewed from above. It is a drawing that compares size, shape, and printing pattern.

In particular, at an angle of 90 degrees, only half of the entire screen appears black, making it the brightest, and at an angle of 45 degrees or 135 degrees, the back margin is obscured by the front line width, making the entire screen appear black, making it the darkest screen. The uppermost part of Figure 4 shows the pattern that appears in the same cross-section as Figure 1 and the case where the viewing angle is 90 degrees, and the lower part shows the resulting shape that appears in this case when the medium is viewed vertically from above, that is, when viewed in the viewing direction. The bottom part of the plan shows the same pattern when the viewing angle is 45 degrees, and the bottom part shows the resulting shape plan when the viewing angle is 45 degrees.

(Example 1)

Figure 5 shows a first printing pattern consisting of a plurality of horizontal lines with the same line width and spacing of 0.45 mm printed on the upper surface of a transparent first sheet, and Figure 6 shows a portion of the shape to be shown on the upper surface of a separate second sheet laminated below it. Shows an embodiment in which a second printing pattern similar to the first printing pattern is formed except for. In this Example 1, the line width of the line in the shape to be expressed in the second printing pattern was reduced by half and printed (expressed). In particular, in this example, the capital letters B and C are overlapped, and the upper half of the line width is removed from the area of B, the lower half of the line width is removed from the area of C, and the entire line width is removed from the area where both B and C overlap. It becomes unprinted.

Figure 7 shows the form seen when the viewing direction is 45 degrees, 90 degrees, and 135 degrees from bottom to top in the anti-counterfeiting medium formed by overlapping the first sheet 10 and the second sheet 20 as shown in Figures 5 and 6. This is a cross-sectional view to theoretically explain.

The first pattern 11 of the upper first sheet 10 has a first pattern of a complete line width in the entire area, and the second pattern of the lower second sheet 20 has a pattern 21 of a complete line width in the background area. , in the part exclusive to B, only the upper half linewidth is an unprinted line pattern (23), and in the part exclusive to C, only the lower half linewidth is present, and the upper half linewidth is an unprinted line pattern (25). , B, and C have an unprinted pattern 27 in which the entire width of the line is not printed.

Therefore, when looking at a horizontal line pattern at a 45-degree angle downward, if the second pattern is the same as the first pattern, the entire part should appear black, but the part corresponding to B, whether exclusive or common, shows an unprinted area of half the distance between the lines. Only the area is revealed relatively brightly, and if you look at the horizontal line pattern obliquely from above, for example at a 135 degree angle, the part corresponding to C, whether exclusive or common, shows an area where half of the distance between the lines is not printed, so only the C area is relatively bright. It becomes revealed. Of course, when viewed from directly above, that is, when looking at a 90-degree angle, the upper line pattern covers both the full line pattern and the half-width line pattern below, making it appear as the same pattern as the first pattern.

Ultimately, depending on the direction of gaze, this anti-counterfeiting medium appears as a simple horizontal line pattern, as a shape representing B, or as a shape representing C.

(Example 2)

In Example 2, the first sheet of FIG. 5 is still positioned on top, and instead of the pattern of FIG. 6 of Example 1, a pattern like FIG. 8 is formed on the upper surface of a separate second sheet laminated to the first sheet to prevent counterfeiting. Use it as a medium.

Here, in the part of the shape to be shown in the second printing pattern, when compared with the part forming the surrounding background, a gap (non-printing area) is formed at the position where the lines of the background pattern are printed, and a gap (non-printing area) is formed in the non-printing area where there must be a gap. Let the lines print. In other words, the printed part called the line and the non-printed part called the gap are expressed in reverse form. In particular, in this example, it was designed to represent the capital letter C of the alphabet.

Figure 9 shows the form seen when the viewing direction is 45 degrees, 90 degrees, and 135 degrees from bottom to top in the anti-counterfeiting medium formed by overlapping the first sheet 10 and the second sheet 30 as shown in Figures 5 and 8. This is a cross-sectional view to theoretically explain.

The first pattern 11 of the upper first sheet 10 is a first pattern with a complete line width in the entire area, and the second pattern of the lower second sheet 30 is a line pattern that looks completely the same as the first pattern in the background area. (31) and a gap portion 32, but in the portion corresponding to the C shape (C display area), the line portion 34, which is a printed portion, is reversed to a non-printed portion in the surrounding background area, and the non-printed portion is inverted in the background area. The denial gap portion 33 is inverted into a printing portion.

Therefore, when viewed from directly above, that is, when viewed from a 90-degree line of sight, part C appears entirely black and appears darker than the background area. At 45 degrees and 135 degrees, the entire background area appears black, but lines and gaps are repeatedly arranged in the area of C. It appears as a relatively bright striped area and functions as an anti-counterfeiting medium.

(Example 3)

In Example 3, the first sheet of Figure 4 is still positioned on top, and instead of the pattern like Figure 8 of Example 2, a pattern like Figure 10 is formed on the upper surface of a separate second sheet laminated to the first sheet to prevent counterfeiting. Use it as a medium.

Here, in the part of the shape (C) to be shown in the second printing pattern, when compared to the part forming the surrounding background, all areas are printed, so there is no distinction between lines and gaps, and no stripe pattern is shown.

Figure 11 shows the form seen when the viewing direction is 45 degrees, 90 degrees, and 135 degrees from bottom to top in the anti-counterfeiting medium formed by overlapping the first sheet 10 and the second sheet 40 as shown in Figures 4 and 10. This is a cross-sectional view to theoretically explain.

The first pattern 11 of the upper first sheet 10 is a first pattern with a complete line width in the entire area, and the second pattern of the lower second sheet 40 is a pattern that looks completely the same as the first pattern in the background area ( 41), but in the part corresponding to the C shape, all of them become the printing part 43, and when viewed from directly above, that is, in the 90-degree line of sight, the entire C part appears black and appears darker than the background area, and at 45 degrees and 135 degrees. In , the entire background area appears black, and the area of C also appears black, making it appear indistinguishable, thereby functioning as an anti-counterfeiting medium.

(Example 4)

In Example 4, the first sheet of FIG. 4 is still positioned on the top, and instead of the pattern like FIG. 10 of Example 3, a printing pattern like FIG. 12 is formed on the upper surface of a separate second sheet laminated to the first sheet to fabricate counterfeiting. Use as a preventive medium.

Here, in the part of the shape (C) to be shown in the second printing pattern, when compared to the part forming the surrounding background, all areas are not printed, so there is no distinction between lines and gaps, and naturally, the stripe pattern is not shown.

Figure 13 is for theoretically explaining the form seen when the viewing direction is 45 degrees, 90 degrees, and 135 degrees from bottom to top in an anti-counterfeiting medium formed by overlapping a first sheet and a second sheet as shown in Figures 4 and 12. This is a cross-sectional view.

The first pattern 11 of the upper first sheet 10 is a pattern that shows a stripe pattern with a complete line width in the entire area, and the second pattern of the lower second sheet 50 appears completely identical to the first pattern in the background area. It has a pattern 51, but in the part corresponding to the C shape, not all areas are printed, so when viewed from directly above, that is, in the 90-degree viewing direction, the C part is also obscured by the first pattern and appears the same as the first pattern. Therefore, the C shape does not appear, but at 45 degrees and 135 degrees, the entire background area appears black, and the C area appears as a simple stripe pattern and appears relatively brighter than the background area, so the C shape can be distinguished, and the difference is made, making it an anti-counterfeiting medium. It functions as.

(Example 5)

Figure 14 shows a grid-shaped first printing pattern consisting of multiple horizontal lines and multiple vertical lines with the same line width and spacing of 0.3 mm printed on the upper surface of a transparent first sheet, and Figure 15 shows the upper surface of a separate second sheet laminated below it. shows an example in which a second printing pattern is formed that is the same as the first printing pattern except for the shape portion to be shown.

Here, in the part of the shape to be shown in the second printing pattern, when compared with the part forming the surrounding background, a gap is formed at the position where the horizontal and vertical lines of the background pattern are printed, and the part where there should be a gap between them forms a horizontal line or Ensure that vertical lines are printed. In other words, lines and gaps are expressed in reversed form.

In this embodiment, a drawing (plan view) of the anti-counterfeiting medium formed by overlapping the first sheet and the second sheet as shown in Figures 14 and 15 as viewed from the normal direction forming 90 degrees with the plane of the anti-counterfeiting medium. As a standard, whether the letter C is distinguishable from the background when viewed at an inclination of 45 degrees, 90 degrees, and 135 degrees from bottom to top, and whether the letter C is distinguishable from the background when viewed at an inclination of 45 degrees, 90 degrees, and 135 degrees from left to right are the same. .

Therefore, considering only the case where the viewing angle is changed from bottom to top based on the plan view, in the part corresponding to the C shape in the printing pattern of the second sheet, the line part that was the print part is reversed to the gap part in the surrounding background area, In the background area, the part that was the gap part is reversed to the line part (printing part).

Therefore, when viewed from the normal direction, that is, from the 90-degree line of sight, the entire C part appears black and appears darker than the background area, making it possible to distinguish the C shape. In addition, at 45 degrees and 135 degrees, the entire background area appears black, but in the area of C, theoretically, a relatively bright part where lines and intervals are repeatedly arranged appears and appears to be distinguishable, but compared to the case of Example 2, the part is darker. There are more, and it is not easy to distinguish them because reflection occurs on the surface of a transparent object. However, regardless of whether it is distinguished or not, it appears in a different form from the one seen from the 90-degree viewing direction, so it functions as an anti-counterfeiting medium anyway.

In this embodiment, compared to Example 2, where the pattern was drawn only with one-dimensional lines, the gaze direction does not necessarily need to be changed in one vertical plane, and the anti-counterfeiting pattern can be recognized by changing the gaze direction in different vertical planes. Therefore, there is no inconvenience of having to turn the anti-counterfeiting object in a specific direction or change one's position in order to identify it. It is convenient because judgment can be made by simply changing the eye level from the current location, and several people around can prevent counterfeiting from various positions. It is convenient because you can check whether or not it is available.

(Example 6)

Example 6 has the same principle of forming an anti-counterfeiting medium as the previous Example 3, but is similar to that in that the anti-counterfeiting effect can be recognized in two or more directions in a two-dimensional plane to identify an object, rather than only in one direction. Similar to the relationship between Example 2 and Example 5.

Compared to the previous Example 5, here, the first sheet of FIG. 14 is still positioned at the top, and the upper surface of a separate second sheet is laminated with a pattern like FIG. 16 instead of the pattern like FIG. 15 of Example 5. It is used as an anti-counterfeiting medium. That is, here, in the part of the shape (C) to be shown in the second printing pattern, when compared with the part forming the surrounding background, all areas are printed and there is no distinction between lines and gaps. Accordingly, the first printing pattern of the upper first sheet is a complete grid-like pattern in the entire area, and the second printing pattern of the lower second sheet has a pattern that looks completely the same as the first pattern in the background area, but corresponds to a C shape. In the part, everything is printed and when viewed from the top to the bottom, that is, when viewed from a 90-degree viewing direction, part C appears entirely black and appears darker than the background area, making it possible to distinguish the shape.

Here, too, with similar logic as Example 5, only the case of looking while changing the viewing angle from bottom to top based on the floor plan will be considered. Then, at 45 degrees and 135 degrees, the entire background area appears black, and the area of C also appears black and appears indistinguishable, thereby functioning as an anti-counterfeiting medium.

(Example 7)

In Example 7, the first sheet of FIG. 14 is still positioned on the top, and instead of the pattern like FIG. 16 of Example 6, a printing pattern like FIG. 17 is formed on the upper surface of a separate second sheet laminated to the first sheet to create a counterfeit. Use as a preventive medium.

Here, in the part of the shape (C) to be shown in the second printing pattern, when compared with the part forming the surrounding background, all areas are not printed, so there is no grid division.

Here, too, with similar logic as Example 5, only the case of looking while changing the viewing angle from bottom to top based on the floor plan will be considered. then,

The second printing pattern of the lower second sheet is not printed at all in the part corresponding to the C shape, so when viewed from the top to the bottom, that is, when viewed from a 90-degree line of sight, the C part is simply covered by the first printing pattern, showing the same grid pattern as the background. It appears as a pattern and the C shape cannot be distinguished.

At 45 degrees and 135 degrees, the entire background area appears black, and the area in C appears relatively bright because the non-printing area is visible, making the difference and functioning as an anti-counterfeiting medium.

Of course, the mention of the above embodiments refers to the ideal case, and in reality, due to material characteristics, differences in viewing angles for each location, and other factors, complete distinction is difficult even when viewed from a 90-degree viewing direction, and part C may appear slightly bright. Even to the naked eye, there will be no problem in its function as an anti-counterfeiting medium, as there is clearly a difference or reduction in the brightness and darkness of the surrounding background.

(Example 8)

In Example 8, the same two-dimensional pattern as in Figure 14 of Example 5 was used as the basic first pattern on the printed sheet as shown in Figure 18, but instead of the grid pattern, a right-angled square pattern like a chessboard was used. There is a difference.

In principle, this quadrilateral pattern has the same alignment of the first and second printing patterns to form an anti-counterfeiting medium and the same aspect shown at each viewing angle, so when the gaze is moved left and right and moving up and down based on the plan view of the anti-counterfeiting medium. The case classification pattern can be applied in the same way.

However, when using the second printing pattern as shown in Figure 18, compared to the grid pattern of Example 5, there are more bright non-printed parts, so the overall appearance can be brighter, and the overall appearance is brighter, such as a dark background and a less dark C shape. You will be able to distinguish better in dark conditions.

Hereinafter, other embodiments will be looked at with reference to FIGS. 19 to 23.

19 to 21 show concentric circles, squares, and triangles as basic patterns that are the first printing pattern. Here too, the line width and line spacing are preferably the same, and the second printing pattern that is aligned vertically to create an anti-counterfeiting medium is a reverse pattern and a reduced line width as in the previous embodiment in the area where the desired shape is desired among the areas with the basic pattern. An anti-counterfeiting function can be provided by forming a pattern, a pattern with the pitch shifted, and a fully printed or unprinted pattern.

In particular, in the case of a circle, it is suitable to enjoy the effect of making the recognition form, which is expressed by changing the gaze angle while moving the eyes in any direction on a two-dimensional plane based on the center of the circle, be distinguished from the surroundings or not,

In the case of a triangle or square, it is suitable to enjoy the effect of making the recognition form, which is expressed by changing the gaze angle while moving the eyes in a direction perpendicular to each side of the triangle or square, be distinguished from the surroundings or not.

Previously, it was said that curves are also possible instead of lines in a stripe pattern, such as in Figure 5 of Example 1, so if the curve is a wavy line such as a sinusoid and has a basic pattern of a wave pattern, a straight line is drawn in the middle where the wave changes up and down. Changing the gaze angle while moving the eyes perpendicular to the straight line will be suitable for enjoying the effects of the present invention.

22 and 23 show an equilateral triangle continuous pattern arrangement and a diamond continuous pattern arrangement as the first printing pattern of the first printing medium (printed object), which is the basic printing pattern. These are examples representing a kind of two-dimensional closed curve figure. , other polygons such as pentagons, hexagons, and octagons, shapes other than polygons such as circles, ovals, asterisks, and other shapes are also possible.

As already mentioned in relation to Figures 20 and 21, by the same principle, if the figure is a triangle or square, the recognition form expressed by changing the gaze angle by moving the eyes in a direction perpendicular to each side of the triangle or square can be distinguished from the surroundings. It is suitable for enjoying the effect of preventing it from happening.

In the above, the present invention is described through limited examples, but these are merely illustrative descriptions to aid understanding of the present invention and the present invention is not limited to these specific examples.

Accordingly, those of ordinary skill in the field to which the invention pertains will be able to make various modifications and applications based on the present invention, and it is natural that such modifications and applications fall within the scope of the appended patent claims.

Claims (9)

A first printed material sheet of a certain thickness made of transparent material, a first printed pattern formed on the first surface (upper surface) of the first printed material sheet, and a second printed pattern formed below and spaced apart by at least the thickness of the first printed material sheet. As an anti-counterfeiting medium equipped with
The first printing pattern and the second printing pattern are moved relative to the second printing pattern in at least one direction on a two-dimensional plane parallel to the surface of the first printing object sheet. The degree of overlap between the first printing pattern and the second printing pattern is changed periodically,
The second printing pattern includes a two-dimensional closed curve shape that is periodically and repeatedly arranged to form a pattern in contrast to the first printing pattern or in contrast to the background area outside the differentiation area over the differentiation area or area portion corresponding to the shape to be expressed. Based on the relative movement direction, a portion can be removed, moved a certain distance, or as a special case of moving a certain distance, if the line width and spacing are the same, the printed part and the non-printed part are reversed, or the entire part is printed. Or, form it to have one pattern change among the methods that do not print the entire thing,
The first print pattern and the second print pattern are
A polygonal printing unit and a printed unit between the polygonal printing units are positioned alternately,
The polygons are arranged continuously to fill the entire sheet without any gaps,
The polygon is a triangle, right-angled square, rhombus, hexagon, octagon, or a regular repetitive combination of these polygons. delete According to claim 1,
The second printing pattern is formed on the upper or lower surface of a second printing material sheet located below the first printing material sheet separately from the first printing material sheet. delete delete According to claim 1,
The second printing pattern includes a two-dimensional closed curve shape that is periodically and repeatedly arranged to form a pattern in contrast to the first printing pattern or in contrast to the background area outside the differentiation area over the differentiation area or area portion corresponding to the shape to be expressed. Remove a portion based on the relative movement direction,
In the differentiation area, the upper part is removed to form a first shape, and the lower part is removed to form a second shape, so that the first shape and the second shape are visible based on the viewer's gaze direction. Anti-counterfeit media. delete delete delete

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