JP2012203266A - Display body and information printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display body which exhibits the anti-counterfeit effect.SOLUTION: The display body includes a relief structure formation layer provided on one surface of a base and a reflecting layer which covers at least a part of the relief structure formation layer. The surface is divided into a plurality of pixels, and at least partial pixels (first pixels) out of the plurality of pixels and the other pixels (second pixels) are provided with first relief structures and second relief structures respectively, and a plurality of convex portions having top surfaces substantially parallel with the surface of the base, a plurality of concave portions having bottom surfaces substantially parallel with the surface of the base, and flat portion substantially parallel with the surface of the base are arranged in the first and second relief structures. In observation in a macro range, a shape in plan view of one relief structure of the second relief structures is equal to a shape in plan view of one relief structure of the first relief structures. The relief structures are arranged aperiodically at random, and the display body constitutes a visible image by arrangement of the first pixels and the second pixels different by relief structures.

Description

  The present invention relates to an image display body whose appearance changes depending on viewing conditions used for the purpose of preventing counterfeiting and an information printed matter including the display body, and in particular, brightness and intention of an image depending on an angle of illumination light, an observation direction, and the like. The present invention relates to a display body that displays an image such that the image changes, and an information printed matter including the display body.

  In recent years, it has 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. The display body is provided in a form with a label such as affixing or pressure bonding to the surface of a certificate such as the above-mentioned securities or a card as a form of a transfer foil or a sticker. In addition, for goods other than securities and certificates, the distribution of counterfeit goods has become a social problem, and there are increasing opportunities to apply the same anti-counterfeit technology to such articles.

  Examples of anti-counterfeiting technologies include micro characters, special light-emitting ink, watermarks, diffraction gratings, and holograms. Such anti-counterfeiting technology can be roughly divided into two. One is anti-counterfeiting measures that determine the authenticity of an object using a simple device or measuring device. The other is anti-counterfeiting that can be easily determined by the naked eye.

  In recent years, security devices have been developed in which electron beam drawing apparatuses (EB apparatuses) having various fine structures can be visually differentiated from similar technologies. However, as a general security device, there is a surface relief type rainbow hologram (see, for example, Patent Document 1). This rainbow hologram has a complicated structure as compared with ordinary printed matter, and is difficult to produce unless it is a specific vendor having a high fine processing technique. In addition, since a large-scale duplicating apparatus is required when performing duplication, there is a difficulty in performing small-scale duplication. Therefore, it has been considered difficult to produce counterfeit products of this type.

  In addition, since a rainbow hologram is reproduced with light close to a single wavelength when illumination light is applied to the display body, it can be observed in bright and vivid colors corresponding to the seven colors of the rainbow, and when the observation conditions change, It has a characteristic appearance that the image pattern changes. For this reason, a difference from other members can be easily discriminated visually. For this reason, the rainbow hologram is excellent for visual security applications and has been widely used as an image display for preventing counterfeiting.

  However, in the rainbow hologram, the color of the reproduced image tends to change greatly even if the observation condition changes slightly, so it is difficult to identify the difference in the color of the image. For this reason, even a rainbow hologram in which different images are recorded, it is easy to give an impression similar to an observer, and there is a difficulty in that it is difficult to distinguish between recorded images between holograms.

JP-A-2-72320

“Principles of Holography”, Optronics, p. By Hari Haran

  As described above, the image display body for preventing counterfeiting of the rainbow hologram has a drawback that it is difficult to determine the difference between recorded images because the color change of the image is large.

  The present invention has been made to solve such problems, and the color and pattern change depending on the observation conditions as in the hologram, but the color change is gentler than that of the rainbow hologram, and the normal observation conditions. Then, by providing a display body that looks almost the same color, it is possible to provide a forgery-preventing medium that makes it easier to discriminate the difference between images compared to a rainbow hologram, and to control the emission angle of diffracted light to control a latent image. Another object of the present invention is to provide a display body having a color changing effect.

  Invention of Claim 1 is a display body provided with the uneven | corrugated structure formation layer provided in one surface of the base material, and the reflection layer which coat | covers at least one part of the said uneven structure formation layer, Comprising: The said surface is The pixel is divided into a plurality of pixels, and among these pixels, at least some of the pixels (first pixels) and the other pixels (second pixels) are provided with a first uneven structure and a second uneven structure, respectively. The first and second concavo-convex structures have a plurality of convex portions whose top surface is substantially parallel to the base material surface or a plurality of concave portions whose bottom surface is substantially parallel to the base material surface and a flat surface substantially parallel to the base material surface. The shape of the plan view of one concavo-convex structure of the second concavo-convex structure is the same when the shape of the plan view of one concavo-convex structure of the first concavo-convex structure is observed in a macro range, and the periodicity Randomly arranged, visible by the arrangement of first and second pixels with different concavo-convex structure An image is formed.

  According to a second aspect of the present invention, in the display body according to the first aspect, the shape of the plan view of one of the first and second uneven structures is a quadrangle, and the long side and the short side of the first uneven structure are The length is 1 μm or more and less than 5 μm, respectively, and the length of the long side and the short side of the second concavo-convex structure is 12.5 μm or more and less than 50 μm, respectively.

  According to a third aspect of the present invention, in the display body according to the first or second aspect, the plurality of pixels are two-dimensionally arranged, and the first and second pixels are alternately arranged. .

  According to a fourth aspect of the present invention, in the display body according to any one of the first to third aspects, a length of one side of the pixel is 145 μm or less.

  According to a fifth aspect of the present invention, in the display body according to any one of the first to fourth aspects, the heights or depths of the plurality of convex portions or concave portions of the first and second concavo-convex structures are constant, 0.1 μm or more and 0.00 It is characterized by being 5 μm or less.

  According to a sixth aspect of the present invention, in the display body according to any one of the first to fourth aspects, the heights or depths of the plurality of convex portions or concave portions of the first and second concavo-convex structures are different and are 0.1 μm or more and 0.00. It is characterized by being 5 μm or less.

  A seventh aspect of the invention is the display body according to any one of the first to sixth aspects, wherein a printed layer is provided on a part of the surface or a part on the opposite side, and the printed layer has the unevenness. It is formed by an ink or toner that displays a color perceived as substantially the same color as the display color observed by the structure.

  The invention according to claim 8 is an information printed matter comprising: a printed material base; and the display according to any one of claims 1 to 7 provided in at least a partial region of the surface of the printed material base. .

  According to the first aspect of the present invention, the diffracted light observed from the display body under normal illumination conditions has a wide range of wavelength distribution because the structure is randomly arranged. Therefore, it is possible to provide a display body capable of observing an image colored with a gentle color as compared with a rainbow hologram. In addition, because the diffracted light emission angle differs between the first concavo-convex structure and the second concavo-convex structure, the display image observed under normal illumination conditions and the display image observed under conditions other than normal illumination conditions change It is possible to make it.

  According to the invention of claim 2, the shape of the plan view of the first and second concavo-convex structures is a quadrangle, and the lengths of the long side and the short side are 1 μm or more and less than 5 μm, 12.5 μm or more and less than 50 μm, respectively. The diffracted light emitted from the first and second concavo-convex structures can be separated, and the display image observed under normal illumination conditions and the display image observed under conditions other than normal illumination conditions are changed. It is possible to make it.

  According to the invention of claim 3, information can be easily handled by arranging pixels two-dimensionally. Further, by arranging the first and second pixels in an orderly manner, it is possible to observe a mixed color of the displayed colors of the first and second uneven structures under normal illumination conditions.

  According to the invention of claim 4, the length of one side of the pixel is preferably 145 μm or less. By orderly arranging pixels having a side length of 145 μm or less, it is possible to prevent the pixel shape from being recognized when the display body is observed with the naked eye.

  According to the invention of claim 5, the height or depth of the convex portion or the concave portion is 0.1 μm or more and 0.5 μm or less, so that the color with the highest contrast can be expressed and the visibility can be improved. In addition, since the height or depth of the convex portion or the concave portion is constant, the display body is observed in one color under normal lighting conditions, but some of the display body 1 under conditions other than normal lighting conditions. The color changes and the latent image pattern is observed.

  According to the invention of claim 6, the color of the first and second concavo-convex structures is mixed under normal illumination conditions by the height or depth of the plurality of convex portions or concave portions of the first and second concavo-convex structures being different. Although the display body is expressed by the above, only the color of the first concavo-convex structure is observed under the condition 1 other than the normal illumination condition due to the difference in the emission angle of the diffracted light. Therefore, the color can be changed.

  According to invention of Claim 7, the display body is provided with the printing layer. The print layer is formed of ink or toner, and forms a color unique to the ink or toner, and the color does not change significantly under conditions 1 other than normal illumination conditions and normal illumination conditions. On the other hand, in the first and second concavo-convex structures, a unique color can be displayed under normal illumination conditions, and color changes occur when the illumination conditions change. Since these two layers having different functions are formed in the display body, it is possible to add a specific visual effect that cannot be realized only by a normal printing layer.

  According to invention of Claim 8, it becomes possible to give the high anti-counterfeiting effect to the conventional articles | goods by bonding the display body of this invention to printed matter, a card | curd, and other articles | goods, or combining them. .

Schematic of the display body surface which concerns on embodiment of this invention. Explanatory drawing which showed the cross section along the II line | wire of the display body shown in FIG. The enlarged view of A area | region shown in FIG. The enlarged view of the B area | region shown in FIG. (A) and (b) are the enlarged views of the area | regions 17 and 18 shown in FIG. The figure which observed the display body under normal illumination conditions. The figure which observed the display body on conditions 1 other than normal illumination conditions. The figure which observed the display body on conditions 2 other than normal illumination conditions.

(Embodiment 1)
Hereinafter, the display according to Embodiment 1 of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a display body according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the display body shown in FIG. 1 taken along the line II in FIG.

  The display body 10 shown in FIG. 1 has a laminated body of the light transmission layer 2 (including the base material 5 and the concavo-convex structure forming layer 6), the printing layer 4, and the light reflection layer 3 shown in FIG. In the display body 10 of this example, the printing layer 4, the light transmission layer 2, and the light reflection layer 3 form a laminated body that is laminated in the order described. The light transmission layer 2 is formed by the base material 5 and the uneven structure forming layer 6, and the uneven structure forming layer 6 is formed in the region of the light transmitting layer 2. In the example of the display body 10, the printed layer 4 side is the front side (observer side), and the light reflecting layer 3 side is the back side.

  Although FIG. 2 shows an example in which the print layer 4 is formed on the front surface of the light transmission layer 2, the print layer 4 may be formed between the light transmission layer 2 and the light reflection layer 3. The light reflecting layer 3 may be provided not on the entire area of the display body 10 but on a part of the display body 10 that needs light reflection.

  In the display body 10 shown in FIGS. 1 to 5, the regions 11 and 12 of the concavo-convex structure forming layer 6 have a plurality of convex portions 19 a and 19 b or bottom surfaces having protruding end surfaces substantially parallel to the surface of the base material 5. A plurality of recesses 14 a and 14 b that are substantially parallel to the surface of the substrate 5 are formed. More on this later. In a region 16 corresponding to the print layer 4 in a region different from the regions 11 and 12, display images such as characters, pictures, symbols, and the like are formed by the print layer 4. Further, the region 15 occupying a region different from the regions 11, 12, 13, and 16 is a region where the convex portions 19 a and 19 b, the concave portions 14 a and 14 b and the printing layer 4 do not exist.

  As shown in FIG. 2, in the light reflecting layer 3, the regions corresponding to the regions 11 and 12 are formed with a convex portion and a concave portion made up of concavities and convexities in the direction opposite to the shape of the convex portion 14 a or the concave portion 14 b. The light reflecting layer 3 covers the back surface of the light transmitting layer 2 in a shape that fits the convex portions 19a, 19b or the concave portions 14a, 14b.

  The printing layer 4 serves as a display unit for displaying images such as characters, pictures, and symbols. The printing layer 4 uses various inks such as offset ink, letterpress ink, and gravure ink depending on the printing method. ing. The ink used for this printing is classified by composition such as resin type ink, oil-based ink, water-based ink, and classification by drying method such as oxidation polymerization type ink, osmotic drying type ink, evaporation drying type ink, ultraviolet curable ink etc. It can be selected as appropriate according to the type of substrate 5 and the printing method. In addition, toner in which colored particles such as graphite and pigment are attached to plastic particles with chargeability is transferred to a base material such as polyethylene terephthalate (PET) film or paper using static electricity, and fixed by heating. It is also possible to form a printing layer.

  Moreover, as a material of the concavo-convex structure forming layer 6, it is possible to use a resin having optical transparency such as a thermoplastic resin or a photocurable resin. In this case, when a thermoplastic resin or a photocurable resin is used, for example, a concavo-convex structure forming layer having a concavo-convex structure on one main surface can be transferred from a metal stamper having a concavo-convex structure. Is possible.

  In FIG. 2, as an example, the light transmissive layer 2 configured by a laminated body of the light transmissive substrate 5 and the concavo-convex structure forming layer 6 is illustrated. The light-transmitting substrate 5 is a film or sheet that can be handled by itself, and for example, PET or polycarbonate (PC) can be used. The concavo-convex structure forming layer 6 is a layer formed on the light-transmitting substrate 5, but the concavo-convex structure forming layer 6 of the light-transmitting layer 2 shown in FIG. It is obtained by applying a thermoplastic resin or a photo-curable resin on the substrate and curing the resin while pressing a stamper against the coating film.

  The material of the light reflection layer 3 is not particularly limited, but it is preferable to use a metal material such as aluminum that exhibits a high reflectance with respect to visible light. In this case, the metal film layer is preferably about 20 to 50 nm in view of optical characteristics. Moreover, it can form by using metal vapor deposition as a method of laminating | stacking the light reflection layer 3. FIG. The printing layer 4 shown in FIGS. 1 and 2 is formed using magenta ink.

  Further, as a method of forming the light reflecting layer 3 partially, after forming the light reflecting layer 3 by vapor deposition, only a specific part is dissolved with a chemical or the like, or the light reflecting layer 3 is formed. For example, a method may be considered in which a specific portion of the light reflecting layer 3 is peeled off by an adhesive material having an adhesive strength stronger than the adhesive strength between the light transmitting resin layer 3 and the light transmissive resin layer. It is also possible to use a method in which a barrier is provided on the front surface of the light-transmitting resin layer to prevent the light reflecting layer 3 from being formed before performing the vapor deposition method.

  Next, the uneven structure of the display body 10 and its optical properties will be described. FIG. 3 is an enlarged plan view showing a region A of FIG. A plurality of pixels are arranged in a matrix in the concavo-convex structure region 11, and these pixels are provided with at least one of two different concavo-convex structure regions 17 and 18. Here, two types of pixels, that is, a pixel having the concavo-convex structure region 17 and a pixel having a concavo-convex structure region 18 different from the concavo-convex structure region 17 are arranged in a checkered pattern as shown in FIG. When the concavo-convex structure regions 17 and 18 in FIG. 3 are viewed from the convex portion, as shown in FIGS. 5A and 5B, the size in plan view of the convex portion 19a toward the concavo-convex structure region 17 is The concavo-convex structure region 18 is formed larger than the size in plan view of the convex portion 19b. In addition, the arrangement of the convex portions 19a and 19b in the concavo-convex structure regions 17 and 18 does not have a certain periodicity, and the arrangement of the convex portions 19a and 19b of the concavo-convex structure regions 17 and 18 is randomly arranged. The average number of repetitions of unevenness in the uneven structure region 17, that is, the average repetition pitch of unevenness is smaller than the average number of repetitions of unevenness in the uneven structure region 18, that is, the average repeat pitch of unevenness.

Moreover, as shown to Fig.5 (a) (b), you may form in the state which the convex part 19a of the uneven structure area | regions 17 and 18 partially overlaps. FIGS. 5 (a) the size of the convex portion 19a of the concave-convex structure area 17 shown in (a plan view size) when the convex portion 19a has a rectangular shape, the depth D ₁ at 20μm its side is 0.2 [mu] m, As for the size (plan view size) of the convex portion 19b of the concavo-convex structure region 18 shown in FIG. 5B, when the convex shape of the convex portion 19b is rectangular, one side of the convex shape of the convex portion 19b is 1 μm. And the depth D ₂ is 0.3 μm.

  Moreover, the planar view of the unevenness in the uneven structure regions 17 and 18 is not limited to the rectangular shape, but also includes polygonal shapes such as an ellipse, a perfect circle, and a triangle. Not necessary.

  FIG. 4 is an enlarged view of the area B in FIG. 1, and unlike the area A in FIG. 1, a group of pixels having the same type of uneven structure area 17 and the same type of uneven structure area 18 are provided. The group of pixels is neatly arranged in a separate area.

  In the concavo-convex structure region 17 in which the arrangement of the convex portions 19a is randomly arranged without a constant periodicity, and in the concavo-convex structure region 18 in which the arrangement of the convex portions 19b is randomly arranged without a constant periodicity, The light intensity distribution of the diffracted light is determined by the size of the projections 19a and 19b in plan view of the concavo-convex structure region.

The light intensity distribution Ix separated from the planar view size ω in the x-axis direction of the convex portions 19a and 19b (or concave portions formed thereby) by a distance L is considered to be a plane wave perpendicularly incident on the convex portions 19a and 19b. And can be calculated by the following equation (1). Here, the x-axis indicates a horizontal axis in a plane parallel to the surface of the display body 10 shown in FIG.

  Here, ω is the size of the convex portion in the x-axis direction, λ is the wavelength, L is the distance from the convex portion, and lowercase letter x is the distance from the 0th-order diffracted light displayed on the screen at a distance L from the convex portion. And

  There are two types of projections in the concavo-convex structure region of the display body 10 in plan view, the first one is the projection 19a, and the plan view size has a side length of 12.5 to 50 μm. . The second one is the convex portion 19b, and the planar view size is 1 to 5 μm in length on one side.

  Here, it is assumed that the white illumination light source is provided vertically above the display body 10, and the white illumination light is incident from the direction perpendicular to the surface of the display body 10 (incident angle α = 0 °). . Further, the light intensity distribution when the visible light region is set to 400 nm to 800 nm and the position away from the display body 10 by 500 mm is considered is as follows from the equation (1). That is, the width of the 0th-order diffracted light having a wavelength of 5 μm and a wavelength of 400 nm is 80 mm, and 160 mm when the wavelength is 800 nm. The width of the 0th-order diffracted light having a length in the x-axis direction of the projection 19a in the x-axis direction of 12.5 μm and a wavelength of 400 nm is 32 mm, and is 64 mm when the wavelength is 800 nm. Therefore, when the observer observes from a position 500 mm away from the display body and the size of the pupil of the human eye is assumed to be 8 mm, the length in the x-axis direction of the planar view size of the convex portion 19a is 5 μm and 12 mm. When the thickness is 0.5 μm, the diffracted light from each of the concavo-convex structure regions can be separated beyond the size of the pupil. Further, when the length of one side in a plan view of the convex portion of the concavo-convex structure region is 50 μm and the wavelength is 400 nm, the width of the 0th-order diffracted light is 8 mm. Therefore, the size capable of separating the regular reflection light and the diffracted light is less than 50 μm on a side. If the size of the projections in the concavo-convex structure region is less than 1 μm, the width of the diffracted light is widened, so that the luminance is lowered and is difficult to visually recognize.

  From the above, the planar view size of the convex portion 19a in the first concavo-convex structure region is 12.5 to 50 μm or more and less than 50 μm, and the planar view size of the convex portion 19b in the second concavo-convex structure region is 1 μm or more. It is preferably less than 5 μm.

  In the above description, the diffracted light from one concavo-convex structure portion is considered, but actually, a plurality of concavo-convex structure regions are randomly arranged. Therefore, the light observed by the observer is a combination of light in a certain range of wavelengths, and as a result, colors of light having a plurality of wavelengths are observed.

  Further, the color expressed by the concavo-convex structure region has low diffraction efficiency at a specific wavelength depending on the depth or height of the concavo-convex structure region. For this reason, as a result, the light reaching the observer perceives light in which the specific wavelength component of the incident white illumination light source is weakened. Therefore, it is possible to display different colors when observing each concavo-convex structure portion region by forming the concavo-convex structure portion region having a different depth or different depth from each other. As an example, the color is confirmed to be yellow at a depth of 0.3 μm and magenta at a depth of 0.2 μm.

  The height of the convex portion or the depth of the concave portion in the concavo-convex structure region of the present invention is preferably 0.1 μm or more and 0.5 μm or less. Also, if the height of the convex part or the depth of the concave part is shallower than 0.1 um, the same quality can be achieved stably due to external factors during manufacturing (variation in machine and environmental conditions, slight changes in material composition, etc.) It is difficult to manufacture a thin structure, and when it is deeper than 0.5 μm, it becomes difficult to precisely transfer and mold a fine and deep structure.

  In the present invention, the pixel size is preferably within 145 μm. When the observer observes the state of the image display body at a position 500 mm away from his / her own eye, the resolution of a human eye with a visual acuity of 1.0 is generally 1 minute. A structure of 145 μm or less cannot be decomposed. Therefore, when the length of the long side of the pixel is 145 μm or less, the pixels cannot be decomposed. Therefore, by setting the length of the long side of the pixel to 145 μm or less, it is possible to provide an image display body that displays a higher quality image.

  Next, the case where the display body is observed under conditions 1 and 2 other than normal illumination conditions and normal illumination conditions will be described.

  When the display 10 is observed under normal illumination conditions, the letter “T” has two types of uneven structure regions with different depths arranged in a checkered pattern. For this reason, it is expressed by a mixed color of yellow and magenta, which are expressed by both concavo-convex structures. The letter “O” (printing layer) represents magenta. Further, although the letter “P” is composed of two types of concavo-convex structures, since the depths are the same, the letter “P” and the hole portion of P are represented in magenta as shown in FIG.

  When the display body 10 is observed under condition 1 other than normal illumination conditions, the letter “T” has two types of concavo-convex structure regions with different diffracted light emission angles arranged, so that it is not under normal illumination conditions. The magenta which is not observed under the condition 1 is eliminated, and is expressed only in yellow. Therefore, a color changing effect can be expressed. In the letter “O”, magenta is observed without changing under normal illumination conditions. In the character “P” portion, a character with a hole is expressed in magenta (FIG. 7).

  When the display body 10 is observed under the condition 2 other than the normal illumination condition, the characters “T” and “P” cannot be observed as shown in FIG. 8, and only the character “O” is observed.

  The color of the display body can be controlled by controlling the depth for each region. By controlling the color, it is possible to express colors such as orange, blue, and cyan, thereby improving the design.

  Here, the conditions under which light from the illumination light source enters the display body, the incident light is diffracted by the concavo-convex structure region 17 of the display body, and the observer can perceive the light with the comb is “normal illumination conditions”. Is defined. For example, the light from the illumination light is incident on the display body substantially vertically under illumination light such as a fluorescent lamp in a general room, and the observer observes the display body visually, or sunlight outdoors. A condition in which light from the illumination light is incident on the surface of the display body substantially perpendicularly under the illumination light and the observer observes the display body corresponds to “normal illumination conditions”. Here, “normal illumination light” indicates illumination light such as a fluorescent lamp in the room or sunlight in the room.

  “Condition 1 other than normal illumination conditions” indicates a condition in which the observer cannot perceive the diffracted light in the concavo-convex structure region 17 but perceives the diffracted light in the concavo-convex structure region 18.

  “Condition 2 other than normal illumination conditions” indicates a condition in which the observer cannot perceive diffracted light in the concavo-convex structure region. For example, the light from the illumination light is incident on the surface of the display body substantially parallel, that is, at a steep angle, and the diffracted light is not emitted from the uneven structure area of the display body, or is diffracted from the uneven structure area of the display body. A condition where an observer visually observes the display body from an angle at which the diffracted light does not reach even when light is emitted corresponds to “condition 2 other than normal illumination conditions”.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. Further, the above embodiment includes inventions at various stages, and various inventions can be extracted by appropriately combining disclosed matters.

DESCRIPTION OF SYMBOLS 2 ... Light transmission layer 3 ... Light reflection layer 4 ... Printing layer 5 ... Base material 6 ... Uneven structure forming layer 10 ... Display body 11 ... Uneven structure area 12 ... Uneven structure area 13 ... Uneven structure area 16 ... Printing area 15 ... Uneven Unstructured area 17 ... Uneven structure area (large)
18 ... Uneven structure area (small)
19a ... convex part (large)
19b ... convex part (small)

Claims (8)

A display body comprising a concavo-convex structure forming layer provided on one surface of a substrate and a reflective layer covering at least a part of the concavo-convex structure forming layer,
The surface is divided into a plurality of pixels;
Among the plurality of pixels, at least some of the pixels (first pixels) and other pixels (second pixels) are provided with a first uneven structure and a second uneven structure, respectively,
The first and second concavo-convex structures include a plurality of convex portions whose top surfaces are substantially parallel to the base material surface or a plurality of concave portions whose bottom surfaces are substantially parallel to the base material surface, and a flat surface substantially parallel to the base material surface. Part is placed,
The shape of the plan view of one concavo-convex structure of the second concavo-convex structure is the same when the shape of the plan view of one concavo-convex structure of the first concavo-convex structure is observed in a macro range, and is randomly arranged without periodicity. And
A display body, wherein a visible image is formed by an arrangement of first and second pixels having different concavo-convex structures. The shape of the plan view of one concavo-convex structure of the first and second concavo-convex structures is a quadrangle,
The lengths of the long side and the short side of the first concavo-convex structure are each 1 μm or more and less than 5 μm,
2. The display body according to claim 1, wherein the length of the long side and the short side of the second concavo-convex structure is 12.5 μm or more and less than 50 μm, respectively.   The display body according to claim 1 or 2, wherein the plurality of pixels are two-dimensionally arranged, and the first and second pixels are alternately arranged.   4. The display body according to claim 1, wherein a length of one side of the pixel is 145 μm or less.   5. The height or depth of the plurality of convex portions or concave portions of the first and second concavo-convex structures is constant, and is 0.1 μm or more and 0.5 μm or less. The display body.   5. The height or depth of the plurality of convex portions or concave portions of the first and second concavo-convex structures is different and is 0.1 μm or more and 0.5 μm or less. The display body.   A printing layer is provided on a part of the surface or a part on the opposite side, and the printing layer is made of ink or toner that displays a color perceived as substantially the same color as the display color observed by the uneven structure. The display body according to claim 1, wherein the display body is molded.   An information printed matter comprising: a printed matter base material; and the display according to any one of claims 1 to 7 provided in at least a partial region of the surface of the printed matter base material.

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