JP6609973B2 - Display and printed information - Google Patents

Description

  The present invention relates to a display body used for preventing forgery and the like, and relates to a display body whose appearance changes depending on observation conditions.

  Display with a visual effect different from ordinary printed materials for the purpose of preventing counterfeiting of securities such as gift certificates and checks, cards such as credit cards, cash cards, ID cards, and certificates such as passports and licenses Is applied in the form of a transfer foil, a sticker, or the like to a surface of a certificate such as securities or a card.

  Also, the distribution of counterfeit goods has become a social problem for articles other than securities and certificates, and there are increasing opportunities to apply similar anti-counterfeiting techniques to such articles.

  The anti-counterfeiting technology includes micro characters, special light emitting ink, watermark, diffraction grating, hologram, etc., and the anti-counterfeiting technology can be roughly divided into two. One is a counterfeit measure that determines authenticity by using a verification device such as a simple device or measurement device, and the other is a counterfeit measure that can be easily determined by the naked eye.

  Forgery prevention media, various fine structures have been developed with electron beam lithography equipment (EB equipment), etc., and security devices that can be visually differentiated from similar technologies have been developed. There is a relief type diffraction grating. A diffraction grating has a complicated structure as compared with a general printed matter, and it is difficult to produce the diffraction grating without a high fine processing technique (Patent Document 1).

  However, recently, devices exhibiting optical effects similar to those of diffraction gratings have been distributed, and the anti-counterfeiting effect of diffraction gratings has faded. The provision of

JP 2003-295744 A

  Therefore, in the present invention, as a display body as an excellent security device having new optical characteristics that replaces the diffraction grating, a display body having different display effects can be obtained by changing observation conditions such as an observation direction and an angle when observing. The issue is to provide.

As a means for solving the above problems, the invention according to claim 1 is characterized in that the shape of the surface of the apex portion composed of a plurality of bottom portions and a plurality of polyhedrons is polygonal on the surface of the light-transmitting substrate. A display body in which a certain convex portion is provided in a two- dimensional array, and a reflective layer is further laminated, wherein at least one surface of the convex portion made of the polyhedron is substantially perpendicular to the base material, The display body is characterized in that the thickness of the reflective layer provided on the substantially perpendicular surface is made thinner than the thickness of the reflective layer provided on the other surface, and the transmittance is 40% or more. .

The invention according to claim 2 is characterized in that the distance between the convex portions of the plurality of polyhedrons is 200 nm to 500 nm, and the height of the convex portion is 200 nm to 500 nm. The display body according to Item 1.

  According to a third aspect of the present invention, there is provided a pixel formed by arranging a plane in which the transmittance of the convex portion made of the plurality of polyhedrons is 40% or more with respect to the observation direction, and the plurality of polyhedrons. The display body according to claim 1, wherein a binary image based on a difference in transmittance is formed, the pixel being formed by arranging reflective surfaces of convex portions.

According to a fourth aspect of the present invention, the polygon of the surface shape of the vertex part is configured by any one of a regular triangle, a regular square, and a regular pentagon, and the number of the binary images is equal to the surface of the vertex part. It is the same number as the vertex number of the polygon which comprises, It is a display body as described in any one of Claims 1-3 characterized by the above-mentioned.

An invention according to claim 5 is an information printed matter comprising the display body according to any one of claims 1 to 4 .

  According to the first aspect of the present invention, at least a part of the convex portions made of a plurality of polyhedrons is provided with the light transmission surface with the base material exposed, and the display body is changed in direction to observe the reflective layer. Display by diffracted light emitted from the light and display by light transmitted through the light transmission surface, and a light transmission surface is formed, so if a printed image is provided on the lower surface of the display body, A printed image can also be observed from the transmission surface.

  According to invention of Claim 2, a convex part is arrange | positioned for every distance between convex parts less than the wavelength of visible light, thereby making it difficult to selectively provide a reflective layer and improving the forgery prevention effect. In addition, when the display body is observed from directly above, it is recognized as black, and a visual effect completely different from the conventional diffraction grating can be obtained. Furthermore, the distance between the convex parts of the convex part is 200 nm or more and less than 500 nm, and the height of the convex part is 200 nm or more and less than 500 nm. By setting it to such a value, when the display body is observed from directly above, it is recognized as black.

  According to the invention of claim 3, the direction of the surface that is substantially perpendicular to the substrate is set corresponding to a binary image comprising a reflection layer and a light transmission surface prepared for each observation direction of the display body. Yes. Furthermore, it is possible to display a print image or the like provided on the lower surface at a position corresponding to the image for each observation direction.

According to the invention of claim 4 , since the top surface is formed of a regular triangle, a regular square, or a regular pentagon, the amount of light transmitted through the light transmission surface can be increased, and the light transmission surface can be transmitted more clearly. It is possible to display a print image or the like provided on the lower surface of the display body by the light to be emitted.

According to the invention of claim 5 , it is possible to provide an information printed matter that realizes the action corresponding to any of claims 1 to 4 by sticking the display body to the print layer.

It is the conceptual diagram which showed the structure of the display body of this invention. FIG. 2 is a conceptual cross-sectional view showing a II cross section in the display body of the present invention shown in FIG. 1. It is the conceptual sectional drawing which showed the II-II cross section in the display body of this invention shown in FIG. FIG. 3 is a cross-sectional conceptual diagram in which the structure of the uneven structure region A of the display body shown in FIG. 2 is enlarged. FIG. 3 is a cross-sectional conceptual diagram in which the structure of the uneven structure region B of the display body shown in FIG. 2 is enlarged. FIG. 4 is a conceptual cross-sectional view in which the structure of the uneven structure region C of the display body shown in FIG. 3 is enlarged. It is the perspective view which expanded and showed the structure of the 3rd uneven structure area | region 12c. It is the conceptual diagram which showed a mode that the diffracted light of the 1st uneven structure area | region 12a was inject | emitted. It is the conceptual diagram which showed a mode that the diffracted light of the 2nd uneven structure area | region 12b was inject | emitted. It is the conceptual diagram which showed the light transmission in the X-axis direction in the 3rd uneven structure area | region 12c. It is the conceptual diagram which showed injection | emission of the diffracted light in the Y-axis direction in the 3rd uneven structure area | region 12c. It is the conceptual diagram explaining the binary image. It is the conceptual diagram which showed the direction which observes the display body of this invention. It is the conceptual diagram which showed the example of the convex part structure of FIG. 12 for demonstrating a binary image which is the convex part structure which comprises a pixel, and the substantially perpendicular | vertical surface with respect to a base material is one. It is the conceptual diagram which showed the example of the convex part structure of FIG. 12 for demonstrating a binary image which is the convex part structure which comprises a pixel, and the two substantially perpendicular surfaces with respect to a base material. It is the conceptual diagram which showed the light which permeate | transmits when the display body of this invention is observed. It is the plane conceptual diagram which showed the information printed matter which comprised the display body of this invention. 1 is a conceptual cross-sectional view showing an information printed matter provided with a display body of the present invention. It is the conceptual diagram which showed the arrangement position of the convex part structure in the display body of this invention. It is the conceptual diagram which showed the printed image which can be observed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

<Embodiment 1>
1 is a plan view showing Embodiment 1 of a display body of the present invention, and FIG. 2 is a cross-sectional view taken along the line II of FIG. 3 is a cross-sectional view taken along the line II-II in FIG. The display body 10 includes at least a transmissive layer 11, a reflective layer 13, and an adhesive layer 15. The transmissive layer 11 side is a front side (observer side), and the adhesive layer 15 side is a back side.

  The interface between the transmissive layer 11 and the reflective layer 13 includes a first uneven structure region 12a, a second uneven structure region 12b, a third uneven structure region 12c, and a flat region 12x provided with a plurality of uneven structures. The adhesive layer 15 is formed on the reflective layer 13 or the transmissive layer 11.

  The transmissive layer 11 protects the concavo-convex structure from dirt and scratches on the surface, thereby achieving the effect of maintaining the visual effect of the display body 10 over a long period of time. Furthermore, the transmissive layer 11 makes it difficult to replicate by not exposing the concavo-convex structure.

  As a constituent material of the transmissive layer 11, for example, a resin having optical transparency can be used. Examples of the light-transmitting resin include polyethylene terephthalate, polyethylene naphthalate, polycarbonate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, nitrocellulose, polyethylene, polypropylene, acrylic styrene copolymer, vinyl chloride, and polymethyl methacrylate. Thermosetting resins such as polyimide, polyamide, polyester urethane, acrylic urethane, epoxy urethane, silicone, epoxy, melamine resin, and various acrylic monomers, epoxy acrylate, urethane acrylate that are UV or electron beam curable Reactive polymers such as oligomers such as polyester acrylate, acrylics and epoxies with acrylic and methacrylic groups, and cellulosic resins are used. Possible it is.

  The transmission layer 11 may have a structure of two or more layers in consideration of the surface strength and the ease of forming the uneven structure. In addition, when a metal is used as the constituent material of the reflective layer 13, in order to change the metallic luster color derived therefrom to a different color, a dye or a pigment is mixed into the transmissive layer 11, and the dye or pigment has a specific wavelength. It is also possible to absorb light.

  The reflective layer 13 plays a role of increasing the reflectance of the interface provided with the concavo-convex structure. As a constituent material of this reflective layer 13, metal materials, such as aluminum, silver, tin, chromium, nickel, copper, gold | metal | money, and those alloys, can be used, for example. The reflective layer 13 may be made of a material having a refractive index different from that of the constituent material of the transmissive layer 11 such as a dielectric material. The reflective layer 13 is not limited to a single layer, and may be a multilayer.

  The reflective layer 13 can be formed by using a metal and an oxide such as titanium oxide or zinc sulfide and utilizing a vacuum film forming method. As the vacuum film forming method, a vacuum deposition method, a sputtering method, or the like can be applied. Aluminum is used for the reflective layer 13 of the display body 10.

  The adhesive layer 15 is provided in order to attach the display body 10 to an information printed material on which anti-counterfeiting measures are desired. This adhesive layer 15 may have a structure of two or more layers in consideration of the adhesive strength between the display body 10 and the article to be counterfeited, the smoothness of the adhesive surface of the article, and the like.

  FIG. 2 illustrates a configuration in which the display body 10 is observed from the transmissive layer 11 side, but a configuration in which the display body 10 is observed from the reflective layer 13 side by providing the adhesive layer 15 on the opposite side of FIG. It can also be adopted.

  Next, the concavo-convex structure provided at the interface between the transmissive layer 11 and the reflective layer 13 will be briefly described. The first uneven structure region 12a, the second uneven structure region 12b, and the third uneven structure region 12c at the interface have uneven structures having different structures. Specifically, the first concavo-convex structure region 12a has a striped diffraction grating structure, and diffracted light can be observed at a certain angle.

  The second concavo-convex structure region 12b can observe diffracted light at an angle different from that of the first concavo-convex structure region, and has a striped or two-dimensional array of concavo-convex structures. The third concavo-convex structure region 12c can observe diffracted light at the same position as the second concavo-convex structure region 12b, and has a striped or two-dimensional array of concavo-convex structures. The other interface portion exhibits a flat region 12x.

  FIG. 3 shows a cross-sectional view of II-II. As shown in FIGS. 2 and 3, the convex portion of the third concavo-convex structure region 12c has a structure in which there is no inclination in the X-axis direction and there is an inclination in the Y-axis direction.

  Next, the uneven structure will be described in detail. The first concavo-convex structure region 12a in FIG. 2 is a general diffraction grating, and has a periodic sinusoidal cross-sectional shape. For example, the typical lattice line interval is about 500 to 2000 nm, and the grating depth is 100 to 100. It is formed in a dimension of about 1000 nm.

  FIG. 4 is an enlarged view of a region A of the second uneven structure region 12b of FIG. As shown in FIG. 4, the second concavo-convex structure region 12 b has a periodic sinusoidal cross section, and is, for example, a distance between the convex portions of about 200 to 500 nm and a difference between the top 16 t and the bottom 16 c of the convex portion 16. The depth is about 200 to 500 nm. The reflective layer 13 is provided in a concavo-convex structure with a substantially uniform thickness. The convex portion 16 includes a top 16t, a left slope 16a, a right slope 16b, and a bottom 16c.

  The distance between the convex portions of the second concavo-convex structure region 12b is 200 nm to 500 nm as described above. In general, as the distance between the convex portions of the concavo-convex structure region 12b becomes smaller, the brightness and saturation decrease, enabling a black display, and the luminance increases as the distance between the convex portions increases. The structure is perceived as dark gray. In addition, the deeper the concavo-convex structure, the more black display is possible, and as the depth becomes smaller, the luminance increases and is perceived as dark gray.

  Typically, the depth of the concavo-convex structure is desirably 1/2 or more of the distance between the protrusions. Specifically, when the distance between the protrusions is 500 nm, the depth of the concavo-convex structure is 250 nm or more. By doing so, it becomes possible to display dark gray, and further, by making the depth 500 nm or more larger than the distance between the convex portions, it becomes possible to display blacker.

  However, when the distance between the convex portions is shortened or the depth of the concavo-convex structure is increased, it becomes difficult to form the concavo-convex structure. Therefore, the distance between the convex portions is 200 nm or more and the depth is 500 nm or less.

  Further, when the distance between the protrusions becomes long or the depth of the protrusions becomes small, it becomes difficult to display black or dark gray. Therefore, the distance between the protrusions is set to 500 nm or less and the depth of the protrusions is set to 200 nm or more. This applies similarly to the third uneven structure region 12c.

  FIG. 5 is an enlarged view of a region B of the third uneven structure region 12c of FIG. As shown in FIG. 5, the third concavo-convex structure region 12 c has a periodic rectangular cross-sectional shape, and the transmission layer 11 and the side surfaces 17 a and 17 b are substantially vertical. The concavo-convex structure is formed, for example, in a dimension with a distance between convex portions of about 200 to 500 nm and a depth of about 200 to 500 nm.

  5 includes a top 17t, side surfaces 17a and b, and a bottom surface 17f. The reflective layer 13 is provided on the top 17t and bottom surface 17f of the convex portion 17 and is not provided on the side surfaces 17a and b. .

  Alternatively, the reflective layer 13 is thinner on the side surfaces 17a and b than on the top 17t and the bottom surface 17f. That is, the uneven structure has a configuration in which the reflective layers 13 and the transmissive layers 11 are alternately arranged, or has a configuration in which thin reflective layers and thick reflective layers are alternately arranged.

  Specifically, the thin reflective layer refers to a case where the transmittance is 40% or more when light is incident on the reflective layer 13. A thick reflective layer refers to a case where the transmittance is 5% or less when light is incident on the reflective layer 13. In the following description, the latter configuration will be omitted.

  FIG. 6 is an enlarged view of a region C of the third uneven structure region 12c of FIG. As shown in FIG. 6, the third concavo-convex structure region 12 c has a periodic trapezoidal cross-sectional shape, and is formed, for example, with a distance between protrusions of about 200 to 500 nm and a depth of about 200 to 500 nm. .

  The reflective layer 13 is provided on the top 17t, the bottom 17f, and the side surfaces 17c, d of the convex portion 17 with a substantially uniform thickness. In FIG. 6, the bottom surface 17 f is illustrated, but the concavo-convex structure omitted may be considered.

  Here, the principle of forming the reflective layers on the side surfaces 17a, b, c, and d of the convex portion 17 of the third uneven structure region 12c will be described. Since the side surfaces 17a and 17b of the third concavo-convex structure region 12c are substantially perpendicular to the base material, when the reflective layer 13 is formed by sputtering or vacuum deposition, the surfaces 17a and b are deposited. Since it is perpendicular to the source, the reflective layer 13 is thinner than 17c and d.

  Further, the top 17t and the bottom 17f of the convex portion 17 are formed with a thicker reflective layer. That is, the side surfaces 17a and 17b whose surfaces are perpendicular to the direction of the vapor deposition source are difficult to form the reflective layer, and the side surfaces 17c and d having an angle with respect to the vapor deposition source are easy to mold the reflective layer. Therefore, it means that the position of the reflective layer 13 can be selectively formed by controlling the shape of the convex portion.

  When the reflective layer is formed on the side surfaces 17a and b, the reflective layer on the side surfaces 17a and b can be removed by performing wet etching or the like after forming the reflective layer. This is because the reflective layer disappears from the thinnest side surfaces 17a and 17b because the thickness of the reflective layer on each surface is different.

  The shape of the convex portion of the third concavo-convex structure region 12c has different cross sections in the X-axis direction and the Y-axis direction as shown in FIGS. The convex portion 17 is composed of five surfaces, a top 17t and side surfaces 17a, b, c, and d. This means that the side surfaces 17a, b, c, and d are composed of one plane. In this case, the shape of the top 17t of the convex portion 17 is a quadrangle. In the embodiment, the shape of the top 17t is a square, but other polygons such as a triangle, a pentagon, and a hexagon may be used.

  However, a hexagon or more is not preferable because the area of each side surface constituting the convex portion 17 becomes small and the area of the side surface becomes small. Moreover, even if the shape of the top is not more than a pentagon, a shape having equal sides such as a regular triangle is preferable. This is because the areas of the side surfaces constituting the convex portion 17 are different.

  FIG. 7 is a perspective view of the third uneven structure region 12c. As shown in FIG. 7, in the third concavo-convex structure region 12c, the convex portions 17 are periodically two-dimensionally arranged on the X axis and the Y axis. FIG. 7 shows an example in which typical convex portions are arranged. For example, the convex portions may be arranged in parallel with a straight line where the X axis and the Y axis intersect at an angle of 45 degrees. Although not shown, the convex portions may be arranged in stripes.

FIG. 8 shows the behavior of light incident on the first concavo-convex structure region 12a. In the first concavo-convex structure region 12a, for example, when the incident light L1 is incident vertically, the distance between the protrusions and the incident light L1. ± n-order diffracted lights L2 _{1 to} L2 _n and L2 _{−1 to} L2 _−n are emitted at an angle uniquely determined by the wavelength and the incident angle.

+1 at position P1-order diffracted light L2 ₁ is emitted, when observing the display body 10, the diffracted light L2 ₁ with bright luster is observed. Further, when the display body 10 is observed at the position P2 where no diffracted light is emitted or there is little diffracted light, the diffracted light is not observed and the color of the reflective layer 13 is recognized.

  FIG. 9 shows the emission of diffracted light in the second concavo-convex structure region 12b. In the second concavo-convex structure region 12b, diffracted light cannot be observed even if the incident light L1 is incident vertically. This is because the distance between the convex portions of the second concavo-convex structure region 12b is smaller than that of the first concavo-convex structure region 12a.

  The 2nd uneven structure area | region 12b exists in the range of about 200-500 nm distance between convex parts, and the depth of about 200-500 nm. In such a concavo-convex structure, the diffracted light L4 is emitted only when the incident light L3 has a large incident angle.

In addition, when viewed from directly above the display body 10, the refractive index gradually changes at the interface portion of the concavo-convex structure due to the concavo-convex structure. Accordingly, since the incident light is not reflected, the display body 10 is observed as black. Further, when the display body 10 is observed at a position where no diffracted light is emitted or there is little diffracted light, the diffracted light is not observed and black is recognized.

  In the third uneven structure region 12c, the uneven structure as described above is arranged. The distance between protrusions and the depth of the concavo-convex structure is the same as that of the second concavo-convex structure region 12b, and is omitted. The difference between the second concavo-convex structure region 12b and the third concavo-convex structure region 12c is whether or not there is a surface substantially perpendicular to the transmission layer 11 on the surface constituting the convex portion.

  The second concavo-convex structure region 12b is different in that the reflective layer 13 is provided in the entire concavo-convex structure, whereas the third concavo-convex structure region 12c is selectively provided with the reflective layer 13. When the display body 10 is observed in such a third concavo-convex structure region 12c at a position where no diffracted light is emitted, no diffracted light is observed. Can be observed.

  FIG. 10 shows the emission of diffracted light in the concavo-convex structure region C shown in FIG. 5, and the reflection layer 13 is formed on a surface other than substantially perpendicular to the transmission layer of the third concavo-convex structure region 12c to reflect the light. Diffraction emitted from the reflective layer 13 by changing the direction in which the display body 10 is observed from the P5 direction to the P6 direction by the structure including the side surfaces 17a and 17b in which the transmissive layer 11 is exposed between the layers 13. The display can be switched between the display by light and the display of a printed image or the like provided on the lower surface of the display body 10 by the light transmitted through the side surface 17a or 17b.

  FIG. 11 shows the concavo-convex structure in the Y-axis direction of the third concavo-convex structure region 12c. In this structure, since the reflective layer 13 is uniformly provided on the convex portion, the printed image provided on the lower surface cannot be displayed, and only the diffracted light can be observed.

  The display body 10 having such a display switching function cannot manufacture a counterfeit product by a counterfeit method using a color copy or a scanner, for example. Therefore, by using the display body 10 having such a switching function as a forgery prevention measure, it is possible to easily and reliably execute the true / false discrimination by visual observation, and to make it more difficult to manufacture a counterfeit product.

  Next, switching of images by position control of the reflective layer will be described. As described above, the reflective layer 13 is provided on a surface other than substantially perpendicular to the surface constituting the convex portion. Since the portion where the reflective layer 13 is not provided functions as a light transmission surface, a printed image or the like provided on the lower surface can be displayed.

  In other words, it is possible to display a printed image or the like provided on the lower surface only from the direction where the reflective layer 13 is not provided. That is, it is possible to change the light transmission surface by controlling a portion where the reflective layer 13 is not provided, that is, a substantially vertical surface.

  In order to control the position of such a substantially vertical plane, setting is performed using a binary image composed of a substantially vertical plane with a reflective layer and a plane with another reflective layer.

  FIG. 12 is a binary image showing the position of a substantially vertical surface when the top surface of the convex portion is a rectangle. The number of the surfaces constituting the convex portion is the same as the number of vertices of the shape of the top surface excluding the top. The number of binary images is the same as the number of vertices. Therefore, FIG. 12 shows four binary images. FIG. 12 shows an image obtained by dividing the image vertically and horizontally.

Here, for the sake of explanation, 25 divisions are used. A white portion in FIG. 12 represents a substantially vertical surface where the reflective layer is thin, and a black portion is a surface where a reflective layer which is not a substantially vertical surface is formed. That is, the white portion of the binary image has a transmittance of 40% or more, and is a position where a printed image or the like provided on the base can be displayed. In addition, a), b), c), and d) in FIG. 12 each represent a position of a substantially vertical plane corresponding to the observation position.

  FIG. 13 shows the respective observation positions. 12a shows a case where the display body is observed from W1, b) a case where the display body is observed from W2, c) a case where the display body is observed from W3, and d) a case where the display body is observed from W4. It shows the case observed from. The reflective layer 13 is not provided at the position of the substantially vertical plane.

  That is, it means that a light transmission surface with a thin reflection layer is disposed in the white portion. Therefore, when observed from W1 of the display body, a print image provided on the lower surface other than the central portion can be displayed in FIG. Similarly, in b), when viewed from W2, a printed image of the lower surface provided only in the central portion can be observed. Similarly, the observed positions are different also in c) and d). That is, by changing the observation direction, the position of a print image or the like provided on the lower surface can be switched.

  FIG. 14 shows a convex structure having one substantially vertical plane, where a) is transparent when viewed from W2, b) is transparent when viewed from W3, c) is transparent when viewed from W1, and d ) Appears transparent when viewed from W4. It is a top view of the structure arrange | positioned in x1y1, x3y3, x1y3, x3y1 position of FIG.

  FIG. 15 shows a convex structure having a surface that is substantially perpendicular to two substrates, and the surface observed from W2 and W4 is a substantially vertical surface. For example, x3y4 in FIG. 12 has the structure e) shown in FIG.

  FIG. 16 is a conceptual diagram showing transmitted light when a display body having a thin and substantially vertical surface of a reflective layer is observed with respect to the base material of the present invention (W3, W4); When observing from the direction of the surface that is substantially perpendicular to the base material of the convex portion consisting of a plurality of polyhedrons, it indicates that light is transmitted because the reflective layer is thin or not provided on the surface, When viewed from the direction (W1, W2) in which the reflective layer is formed, black is observed as described above.

<Embodiment 2>
The information printed matter of the present invention will be described below with reference to the drawings. FIG. 17 is a diagram showing an overview of the information printed matter 20. FIG. 18 is a sectional view of the information printed matter.

  The display body 10 is not limited to the short shape as shown in FIG. 17, but is circular or elliptical, has a strip shape that traverses or crosses the information printed matter 20, and covers the front surface of the information printed matter. Various forms, such as those, can be attached.

  Here, the information printed matter 20 includes a sheet-like or flat substrate (information printing substrate) 21, a printed layer 22 printed on the substrate 21, and a surface on which the diffraction grating is formed on the printed layer 22. The display body 10 attached to a part (or all) of the print layer 22 through the adhesive layer 15 so as to be pasted, and the protective layer 24 formed on the display body 10 are provided.

  As the base material 21, for example, a sheet-like or flat base material such as paper, a plastic plate, or a plastic film can be used. In addition, when the information printed matter 20 is a credit card, an ID card, or the like, a warp preventing layer for preventing the base material 21 from warping or an ink adhesion layer for improving the adhesion of printing ink may be provided. Further, a magnetic film layer or the like may be separately provided on the base material 21. Even when the substrate 21 is paper, layers having various functions are provided as necessary.

  The print layer 22 can use information such as arbitrary patterns, characters, symbols, and the like according to the use of the information printed matter 20.

  For example, the adhesive layer 15 may be formed in advance on the surface of the display body 10 on the diffraction grating side, or may be formed on the printed layer 22 of the information printed matter 20.

  The protective layer 24 is a layer for protecting the display body 10 from scratches and dirt, and is not essential and may be omitted.

  In the region M30 and the region N31 of the display body 10 in FIG. 19, the convex portions a) and the convex portions c) in FIG. 14 are periodically arranged, respectively.

  Next, the operation of the information printed matter configured as described above will be described. In the information printed matter 20, since the display body 10 displays the print layer 22 below the display body 10 through the light transmission surface, information such as a pattern, characters, and symbols drawn on the print layer can be visually recognized, and the design of the print layer 22. Property can be impaired and design constraints can be reduced. Further, by changing the observation direction, it is possible to switch the position for displaying the print layer 22 below the display body 10.

  20A shows an image obtained when the display body 10 is observed from the W2 direction, and FIG. 20B shows an image obtained when the display body 10 is observed from the W1 direction. In this way, by changing the observation direction, it is possible to change the position at which the printed layer 22 below the display body 10 is displayed.

  Supplementally, since the entire surface of the conventional display body is made of a diffraction grating, which is a reflective layer, the printed layer directly under the display body cannot be seen at all. It is not suitable to design a picture or the like.

  On the other hand, in the information printed matter 20 of this embodiment, since the printing layer 22 directly under the light transmitting surface of the display body 10 can be visually recognized, design constraints can be reduced.

  Moreover, the position of the printing layer 22 immediately below can be changed through the light transmission surface of the display body 10 by changing the observation position.

  As described above, according to the present invention, an information printed matter having an effect of displaying the print layer 22 below the display body 10 is realized by providing the display body 10 attached to a part or all of the print layer 22. be able to.

  In addition, since information such as a pattern, characters, symbols, and the like drawn on the printing layer 22 immediately below the display body 10 can be visually recognized, the design properties of the printing layer 22 can be impaired and design restrictions can be reduced. Furthermore, it is possible to switch the position where the printing layer 22 below the display body 10 is displayed in the concavo-convex structure.

  In addition to the effect of displaying the printed layer, the display 10 has a low reflectivity effect due to the concavo-convex structure and an optical effect due to diffracted light.

  It is very difficult to forge the information printed matter 20 with the display body 10 attached thereto.

DESCRIPTION OF SYMBOLS 10 ... Display body 11 ... Transmission layer 12 ... Uneven structure area 13 ... Reflective layer 15 ... Adhesive layer 17 ... Convex part 20 ... Information printed matter 22 ... Print layer 24 ... Protective layer 30 ... region M
31 ... area N

Claims (5)

On the surface of the substrate having optical transparency,
The convex part whose shape of the surface of the vertex part which consists of a plurality of bottom parts and a plurality of polyhedra is a polygon ,
Provided in a two- dimensional array,
Furthermore, a display body in which a reflective layer is laminated,
The at least one surface of the convex portion comprising the polyhedron is substantially perpendicular to the base material;
The thickness of the reflective layer provided on the surface substantially perpendicular to the base material,
A display body characterized in that it is thinner than the thickness of the reflective layer provided on the other surface and the transmittance is 40% or more. The distance between the protrusions of the plurality of polyhedrons is 200 nm to 500 nm,
The height of a convex part is 200 nm-500 nm, The display body of Claim 1 characterized by the above-mentioned. A pixel formed by arranging a plurality of projections made of a plurality of polyhedrons with a transmittance of 40% or more and a reflection surface of the projections made of a plurality of polyhedrons arranged in the observation direction. The display body according to claim 1, wherein a binary image based on a difference in transmittance formed of pixels is formed. The polygon of the surface shape of the vertex portion is configured by any one of a regular triangle, a regular square, and a regular pentagon, and the number of the binary images is the same as the number of vertices of the polygon that configures the surface of the vertex portion. display body according to any one of claim 1 to 3, characterized in that. An information printed matter comprising the display according to any one of claims 1 to 4 .