JP2015138043A - Display body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display body that can improve an advertising property.SOLUTION: A display body 100 includes a transparent rugged structure 10 having a rugged surface 12 formed of micro projections 11 arranged at a distance to be the minimum wavelength in a visible light band or less, and a transparent pattern layer 20 that is provided on a part of a surface 17 on the opposite side of the rugged surface of the rugged structure. The refractive index of the rugged structure is different from the refractive index of the pattern layer.

Description

  The present invention relates to a display body that displays information with a pattern.

  Conventionally, a transparent or opaque colored layer made of colored ink or the like on a surface of a transparent substrate constituting a glass window, a glass door, a transparent wall, or a transparent partition, etc. Display bodies formed in a pattern have been proposed (see, for example, Patent Documents 1 to 3). This display body displays advertisements and advertisements for products, stores, companies, services, etc., and displays various information such as doorway, smoking cessation, and business.

Japanese Patent Laid-Open No. 6-12007 Japanese Utility Model Publication No. 3-45932 Utility Model Registration No. 3152336

  However, in the above conventional display body, ambient light such as sunlight is reflected on the front and back surfaces of the transparent substrate due to the difference in refractive index at the interface between the transparent substrate and air. For this reason, the reflected light is superimposed on the pattern, thereby hindering the clear visual recognition of the pattern.

In addition, the observer can grasp that a certain pattern is present even though it is unclear even when the display body is observed from any direction. Therefore, it is not surprising for the observer.
Therefore, in the conventional display body, the viewer's interest cannot be attracted strongly, and the advertising property is not sufficiently high.

  This invention is made | formed in view of such a condition, and it aims at providing the display body which can improve advertisement property.

The display body according to the present invention comprises:
A transparent concavo-convex structure having a concavo-convex surface formed by microprotrusions arranged at intervals equal to or shorter than the shortest wavelength in the visible light band;
A transparent pattern layer provided on a part of the surface opposite to the uneven surface of the uneven structure,
The refractive index of the uneven structure and the refractive index of the pattern layer are different.

In the display according to the present invention,
The pattern layer may have a refractive index higher than that of the concavo-convex structure.

In the display according to the present invention,
The pattern layer may be formed using a transparent ink.

In the display according to the present invention,
The pattern layer may display a pattern, and the pattern may display information.

In the display according to the present invention,
The pattern may include a barcode or a two-dimensional code.

A method for manufacturing a display body according to the present invention includes:
Forming a concavo-convex structure having a concavo-convex surface formed by microprotrusions arranged at intervals equal to or shorter than the shortest wavelength of the visible light band;
A step of printing a transparent ink on a part of the surface opposite to the uneven surface of the uneven structure to form a pattern layer;
Is provided.

  According to the present invention, advertising properties can be improved.

It is a top view which shows the display body which concerns on one Embodiment of this invention. It is sectional drawing along the AA line of the display body of FIG. It is a perspective view which shows the uneven structure layer of FIG. It is a plane photograph which shows an example of the uneven surface of an uneven structure layer.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings other than the photographs attached to the present specification, for the sake of illustration and ease of understanding, the scale and the vertical / horizontal dimensional ratio are appropriately changed and exaggerated from those of the actual ones.

  FIG. 1 is a plan view showing a display body 100 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of the display body 100 of FIG. As shown in FIGS. 1 and 2, the display body 100 has a flat plate shape, for example. However, the display body 100 is not limited to a flat plate shape, and may be a flat film shape, a flat sheet shape (referred to as a film, a sheet, and a plate in the order of relatively thin thicknesses) depending on the application. In addition, instead of a flat shape, a curved shape, a three-dimensional film shape, a sheet shape, or a plate shape can also be used.

  1 and 2, the xy direction is an in-plane direction of the plate surface of the display body 100, and the z direction is a normal direction of the plate surface of the display body 100. “Plate surface (film surface, sheet surface)” means a target plate-like member (film-like member, film-like member, when the target plate-like (film-like, sheet-like) member is viewed overall and globally. It refers to the surface that matches the planar direction of the sheet-like member.

  The display body 100 includes a transparent concavo-convex structure 10 and a transparent pattern layer 20.

  The concavo-convex structure 10 has a concavo-convex surface 12 formed by minute protrusions 11 arranged at intervals equal to or shorter than the shortest wavelength in the visible light band. The uneven structure 10 includes an uneven structure layer 15 having the uneven surface 12 and a transparent substrate 16 that supports the uneven structure layer 15.

  In the display body 100, the uneven structure layer 15 functions as a so-called moth-eye structure. As a result, the display body 100 can exhibit an extremely excellent antireflection function on the uneven surface 12 of the uneven structure layer 15.

  The pattern layer 20 is provided on a part of the surface 17 on the side opposite to the uneven surface 12 of the uneven structure 10. That is, the pattern layer 20 is provided on the surface of the transparent substrate 16 opposite to the surface in contact with the concavo-convex structure layer 15.

  From the viewpoint of ensuring good visibility, the visible light transmittance of the display body 100 is preferably 70% or more, and more preferably 80% or more.

Hereinafter, each structure of the display body 100 is demonstrated.
<Transparent substrate 16>
As the transparent substrate 16, a known transparent substrate having a shape according to the shape of the display body 100 and a thickness and strength according to the use of the display body 100 can be appropriately selected and used, and is not particularly limited. . Examples of the material used for the transparent substrate 16 include a transparent inorganic material and a transparent resin. Examples of the transparent inorganic material include glass such as soda glass, potassium glass, and lead glass, ceramics such as PLZT, quartz, and fluorite. On the other hand, as the transparent resin, for example, acetyl cellulose resins such as triacetyl cellulose, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, olefin resins such as polyethylene and polymethylpentene, acrylic resins, polyurethane resins, Examples thereof include polyether sulfone, polycarbonate, polysulfone, polyether, polyether ketone, acrylonitrile, methacrylonitrile, cycloolefin polymer, and cycloolefin copolymer.

  The transparent substrate 16 preferably has a transmittance in the visible light region of 80% or more, and more preferably 90% or more. Here, the transmittance of the transparent substrate 16 can be measured by JISK7361-1 (a test method for the total light transmittance of plastic-transparent material).

  The thickness of the transparent substrate 16 can be appropriately set according to the use of the display body 100, and is not particularly limited, but is usually 20 to 5000 μm, and the transparent substrate 16 is supplied in the form of a roll, Although it does not bend to the extent that it can be wound, it may be either bent by applying a load or not bent completely.

  The configuration of the transparent substrate 16 is not limited to a configuration composed of a single layer, and may have a configuration in which a plurality of layers are stacked. When it has the structure by which the several layer was laminated | stacked, the layer of the same composition may be laminated | stacked, and the several layer which has a different composition may be laminated | stacked. However, when it is formed in multiple layers, the refractive index difference between adjacent layers is preferably 0.03 or less from the viewpoint of suppressing reflection between adjacent layers, and is 0.01 or less. More preferably. Moreover, when the transparent base material 16 and the uneven | corrugated structure layer 15 are formed from another material, the adhesiveness of the transparent base material 16 and the uneven | corrugated structure layer 15 is improved, and by extension, abrasion resistance is improved. A primer layer may be formed on the transparent substrate 16. This primer layer has adhesion to both the transparent substrate 16 and the uneven structure layer 15 and is transparent. As a material for the primer layer, an ionizing radiation curable resin, a thermosetting resin, or the like can be used.

<Uneven structure layer 15>
As shown in FIGS. 2 to 4, the concavo-convex structure layer 15 has a concavo-convex surface 12 formed by minute protrusions 11 arranged at intervals equal to or shorter than the shortest wavelength in the visible light band. In this case, the “minute” of the minute protrusion 11 means that the minute protrusion 11 is minute enough to be arranged at an interval equal to or shorter than the shortest wavelength in the visible light band. The shortest wavelength in the visible light band refers to the shortest wavelength in the visible light band in an environment where the display body 100 is used. Therefore, when only light from a limited light source exists in an environment where the display body 100 is used, the shortest wavelength of visible light emitted from the light source is the shortest wavelength in the visible light band here. In other cases, 380 nm is adopted as the shortest wavelength in the visible light band here, as the shortest wavelength in the general visible light band.

  The concavo-convex structure layer 15 can be a layer containing a resin, and can be a layer made of a cured product of a resin composition. The resin composition used for forming the concavo-convex structure layer 15 includes at least a resin and, if necessary, other components such as a polymerization initiator. From the viewpoint of suppressing reflection at the interface between the concavo-convex structure layer 15 and the transparent substrate 16, the refractive index difference between the concavo-convex structure layer 15 and the transparent substrate 16 is preferably 0.03 or less, 0.01 More preferably, it is as follows. The resin used for forming the uneven structure layer 15 is not particularly limited as long as it is a transparent material. For example, ionizing radiation curable resins such as acrylate, epoxy, and polyester, thermosetting resins such as acrylate, urethane, epoxy, and polysiloxane, acrylate, polyester, polycarbonate, polyethylene, and polypropylene Various materials such as a thermoplastic resin such as a thermoplastic resin and various types of curing resins can be used for forming the concavo-convex structure layer 15.

  As the resin used for forming the concavo-convex structure layer 15, ionizing radiation curable resin is preferable from the viewpoint of excellent moldability and mechanical strength of the fine protrusions 11. The ionizing radiation curable resin is a mixture of a monomer having radically polymerizable and / or cationically polymerizable bonds in the molecule, a polymer having a low polymerization degree, and a reactive polymer, depending on the polymerization initiator. It is to be cured. In addition, you may contain a non-reactive polymer. The ionizing radiation means electromagnetic waves or charged particles having energy that can be cured by polymerizing molecules. For example, all ultraviolet rays (UV, UV-B, UV-C), visible rays, gamma rays, X Examples thereof include an electron beam and an electron beam.

  The resin composition further comprises a surfactant, a polymerization initiator, a release agent, a photosensitizer, an antioxidant, a polymerization inhibitor, a crosslinking agent, an infrared absorber, an antistatic agent, and a viscosity modifier as necessary. Further, it may contain an adhesion improver and the like.

  Next, the dimension of the uneven structure layer 15 will be described. In the anti-reflection function using the moth-eye structure, the effective refractive index at the interface between the moth-eye structure and the medium adjacent thereto is continuously changed in the thickness direction to prevent reflection. For this reason, the concavo-convex surface 12 of the concavo-convex structure layer 15 is formed by the microprojections 11 arranged along the plate surface of the concavo-convex structure layer 15 with an interval d equal to or shorter than the shortest wavelength in the visible light band. Here, the adjacent microprotrusions 11 related to the distance d are so-called adjacent microprotrusions 11, which are two protrusions in contact with the hem portion of the microprotrusion 11 that is the base portion on the transparent substrate 16 side. is there. In the concavo-convex structure layer 15, when the microprojections 11 are closely arranged, and a line segment is created so as to sequentially follow the valleys between the microprojections 11, a polygonal region surrounding each microprojection 11 in plan view A mesh-like pattern formed by connecting a large number of the dots is produced. The adjacent minute protrusions 11 relating to the distance d are protrusions that share a part of the line segments constituting the mesh pattern. Further, as shown in FIG. 3, the distance d can be a distance between the top portions 13 of the two adjacent microprotrusions 11 along the plate surface of the display body 100.

  However, from the viewpoint of imparting an excellent antireflection function to the concavo-convex structure layer 15, it is more preferable that the minute protrusions 11 forming the concavo-convex structure layer 15 are formed as follows. First, the fine protrusions 11 of the concavo-convex structure layer 15 are preferably provided at intervals d of 70 nm or more and 300 nm or less along the plate surface of the display body 100, and are provided at intervals d of 70 nm or more and 180 nm or less. It is more preferable. Further, the height H of the fine protrusions 11 along the normal direction nd to the film surface of the antireflection film 20 is preferably 50 nm or more and 300 nm or less, and more preferably 100 nm or more and 250 nm or less. preferable.

  Various dimensions and shapes of the uneven surface 12 and the minute protrusions 11 of the uneven structure layer 15 are specified by using an atomic force microscope (AFM) or a scanning electron microscope (SEM). be able to. FIG. 4 is an enlarged photograph actually obtained by an atomic force microscope.

The thickness of the concavo-convex structure layer 15 is not particularly limited, but can be 10 to 300 μm as an example. In this case, the thickness of the concavo-convex structure layer 15 means that the microprojections 11 forming the concavo-convex surface 12 of the concavo-convex structure layer 15 from the interface on the transparent substrate 16 side of the concavo-convex structure layer 15 as shown in FIG. The height t ₁ along the normal direction nd to the plate surface of the display body 100 up to the top 13 is meant.

  In the concavo-convex structure layer 15 as described above, the visible light transmittance of the concavo-convex structure layer 15 alone is preferably 90% or more, and more preferably 95% or more.

  Incidentally, in the concavo-convex structure layer 15 shown in FIG. 4, the microprojections 11 are irregularly arranged, but the arrangement of the microprojections 11 may be irregular or regular. However, from the viewpoint of preventing the occurrence of interference patterns, it is preferable that the arrangement of the microprojections 11 is irregular.

  The configuration of the concavo-convex structure layer 15 is not limited to a configuration composed of a single layer, and may have a configuration in which a plurality of layers are stacked. When it has the structure by which the several layer was laminated | stacked, the layer of the same composition may be laminated | stacked, and the several layer which has a different composition may be laminated | stacked. However, when it is formed in multiple layers, the refractive index difference between adjacent layers is preferably 0.03 or less from the viewpoint of suppressing reflection between adjacent layers, and is 0.01 or less. More preferably.

<Picture layer 20>
The picture layer 20 displays pictures such as letters, numbers, figures, patterns, patterns and patterns. A plurality of patterns may be combined. In the example of FIG. 1, the pattern layer 20 displays a figure. The display body 100 displays information such as a product name, a store name, a facility name, various codes, a barcode, a two-dimensional code, a code, a symbol, a decorative pattern, an advertisement, a sign, and a guide, for example.

  The pattern layer 20 is formed using, for example, transparent ink. The transparent ink is not particularly limited as long as it has a visible light transmittance of about 80% or more.

  The refractive index n1 of the concavo-convex structure 10 and the refractive index n2 of the pattern layer 20 are different. Here, when the concavo-convex structure layer 15 constituting the concavo-convex structure 10 and the transparent base material 16 have different refractive indexes, the refractive index n1 of the concavo-convex structure body 10 represents the refractive index of the transparent base material 16. And In the present embodiment, the refractive index n2 of the pattern layer 20 is higher than the refractive index n1 of the concavo-convex structure 10. For example, the refractive index n1 may be about 1.5 and the refractive index n2 may be about 1.6. More preferably, the refractive index n1 and the refractive index n2 satisfy the relationship of 0.01 <(n2-n1) <0.2.

Next, a method for manufacturing the display body 100 will be described.
(First manufacturing method)
First, the concavo-convex structure layer 15 is formed by subjecting an ionizing radiation curable resin to a forming process.

  Next, the transparent substrate 16 is laminated on the concavo-convex structure layer 15. Such lamination is performed by, for example, applying a resin solution obtained by dissolving a transparent resin in an organic solvent to a desired thickness on the surface of the concavo-convex structure layer 15 that faces the concavo-convex surface 12, and drying and removing the solvent. This is performed by a so-called casting method in which the liquid is solidified and the solidified film is made to be the transparent substrate 16. Thereby, the concavo-convex structure 10 is obtained.

  Alternatively, the concavo-convex structure 10 may be obtained by bonding the transparent substrate 16 and the concavo-convex structure layer 15 using an adhesive. As the adhesive, various types of known adhesive forms such as a pressure-sensitive adhesive (pressure-sensitive adhesive), a two-component curable adhesive, an ultraviolet curable adhesive, a thermosetting adhesive, and a hot melt adhesive can be used. . In addition, as a material for these adhesives, a known resin such as an acrylic resin, a urethane resin, a polyester resin, an epoxy resin, or a rubber may be selected and appropriately blended. In this case, an adhesive layer made of an adhesive is interposed between the transparent substrate 16 and the uneven structure layer 15.

  Next, a transparent ink is printed on a part of the surface 17 on the opposite side of the uneven surface 12 of the uneven structure 10 to form the picture layer 20. As a printing method, a non-contact printing method such as an inkjet method, or various printing methods such as gravure printing, silk screen printing, and offset printing other than the non-contact printing method may be used. In this way, the display body 100 is obtained.

(Second manufacturing method)
First, an uncured and liquid ionizing radiation curable resin is applied onto the transparent substrate 16 to form a resin layer, and the resin layer is subjected to a molding treatment and cured, whereby the concavo-convex structure layer 15 is formed into a transparent substrate. 16 is formed. Thereby, the concavo-convex structure 10 is obtained.

  Next, a transparent ink is printed on a part of the surface 17 on the opposite side of the uneven surface 12 of the uneven structure 10 to form the picture layer 20. In this way, the display body 100 is obtained.

<< Operational effect of display body 100 >>
Next, the function and effect of the display body 100 will be described mainly with reference to FIGS. According to the display body 100 as described above, the concavo-convex structure layer 15 continuously changes the refractive index for incident light from the front direction (z direction) in the thickness direction (z direction) of the display body 100, thereby It is possible to prevent reflection by eliminating the discontinuous interface of refractive index. Therefore, the reflection of ambient light at the interface between the concavo-convex surface 12 of the concavo-convex structure layer 15 and the air is reduced to a level that makes it difficult to visually recognize the reflected light (for example, a reflectance of about 0.5% or less).

  Here, as shown in FIG. 2, a case is considered where the illumination lights L1 and L2 from the light source LS are incident on the concavo-convex surface 12 and the pattern layer 20 from an oblique direction with respect to the plate surface of the display body 100. The light source LS is assumed to have a certain degree of directivity. At this time, an observer O1 who observes the reflected light L1a, L1b, L2a, L2b, and L2c of the illumination lights L1 and L2 from the direction in which the reflected light L1a, L1b, L2a, L2b, and L2c is not observed (front direction, etc.) Hard to see. Since the pattern layer 20 is provided on a part of the surface 17 on the side opposite to the concavo-convex surface 12, it is particularly difficult to visually recognize if the area is small. That is, it is difficult for the observer O1 to notice the presence of the display body 100.

  Here, the illumination light L1 toward the area where the pattern layer 20 is not provided is reflected at the interface between the concavo-convex structure layer 15 and the transparent substrate 16 (reflected light L1a), and also at the interface between the transparent substrate 16 and air. Reflected (reflected light L1b).

  Moreover, the illumination light L2 which goes to the pattern layer 20 is reflected by the interface of the uneven | corrugated structure layer 15 and the transparent base material 16 (reflected light L2a), and is reflected by the interface of the transparent base material 16 and the pattern layer 20 (reflected light). L2b) and also reflected at the interface between the pattern layer 20 and air (reflected light L2c). That is, since the refractive index n2 of the pattern layer 20 is higher than the refractive index n1 of the concavo-convex structure 10, reflected light L2b at the interface between the transparent substrate 16 and the pattern layer 20 is also generated.

  As described above, since it is preferable that the refractive index difference between the concavo-convex structure layer 15 and the transparent substrate 16 is 0.03 or less, the light amounts of the reflected light L1a and the reflected light L2a are the other reflected light L1b, Smaller than the light quantity of L2b and L2c.

  For this reason, when the observer O2 observes the display body 100 from an oblique direction where the reflected lights L1a, L1b, L2a, L2b, and L2c of the illumination lights L1 and L2 are observed, the reflected lights L1b, L2b, and L2c are mainly used. Will be observed. In addition, the sum of the light quantity of the reflected light L2b and the light quantity of the reflected light L2c due to the pattern layer 20 is observed to be larger than the light quantity of the reflected light L1b.

  Therefore, the observer O2 can hardly visually recognize the area where the pattern layer 20 of the concavo-convex structure 10 is not provided, and the pattern layer 20 is relatively easy to visually recognize. Thereby, it can be visually recognized as if the pattern of the pattern layer 20 is three-dimensionally raised in the air (as if floating in the air). For example, the pattern can be visually recognized as black.

  That is, although the difference between the refractive index n2 of the pattern layer 20 and the refractive index n1 of the concavo-convex structure 10 is small, the reflection preventing function of the concavo-convex structure layer 15 causes the reflected light L1b and the reflected light generated by such a small difference in refractive index. The difference in the amount of light from the lights L2b and L2c can be observed more clearly.

  On the other hand, unlike the present embodiment, when the concavo-convex structure layer 15 is not provided, the illumination light and the reflected light of the external light on the surface of the transparent substrate 16 on the viewer side are significantly larger than the present embodiment. Since it is strong, the transparent base material 16 is shining and visually recognized. Therefore, it is substantially impossible to visually recognize the transparent picture layer 20 regardless of the viewing direction.

  As described above, according to the present embodiment, the design of the design layer 20 may or may not be visible depending on the direction in which the display body 100 is observed. Accordingly, the viewer's interest can be strongly attracted, so that the advertising ability can be improved.

  In addition, since the direction in which the pattern of the pattern layer 20 can be observed is limited, when the pattern includes a barcode or the like, the barcode or the like is difficult to be visually recognized by an unspecified number of people, and thus the forgery prevention property can be improved. .

<< Specific Application Example of Display Body 100 >>
Examples of the use of the display 100 include, for example, shop windows, display case windows, shops and office windows, skylights, doors, transparent walls or partitions, vehicles, ships, aircraft windows, and the like. , Framed glass plates, transparent bottles, transparent boxes, transparent packaging containers and the like.

  In particular, when the display body 100 is used as a store show window, the following effects are obtained. Here, description will be made assuming that products are displayed on the pattern layer 20 side of the display body 100 of FIG. 2 and the pattern of the pattern layer 20 is an arrow.

  First, when the observer walks from the positive side in the x direction to the negative side while putting the display body 100 as a show window in the field of view, a position where the reflected lights L2b and L2c from the pattern layer 20 can be directly recognized (observation) When reaching the position of the person O2, the arrow as a picture is suddenly visually recognized. The observer is interested in the arrow and observes the products displayed in the show window in the direction indicated by the arrow while walking. When the observer reaches the vicinity of the front of the show window (the position of the observer O1), the reflected light L2b and L2c from the pattern layer 20 is out of the position where it can be directly visually recognized, so the arrow is not visually recognized and the displayed product Can be observed more clearly.

  In addition, when displaying a barcode, QR code (registered trademark), etc., representing information of products displayed in the inside of the show window using the pattern layer 20, the observer can display the barcode, etc. while walking. Suddenly visible. As a result, the observer is interested in the barcode or the like, and observes the products displayed in the show window. At this time, the observer can acquire product information using a barcode or the like using a mobile phone or a smartphone.

  Hereinafter, the present invention will be described in more detail with reference to examples. In this embodiment, the first manufacturing method described above is used. In this embodiment, the uneven structure layer 15 is referred to as an antireflection film. In addition, this invention is not limited to this Example.

Example 1
[Preparation of anti-reflection film manufacturing mold]
After polishing a rolled aluminum plate having a purity of 99.50% so that the surface roughness Rz is 30 nm as a small undulation and the large undulation is 1 μm, a conversion voltage of 40 V is obtained in an electrolyte solution of a 0.02 M oxalic acid aqueous solution. Anodization was carried out at 20 ° C. for 120 seconds. Next, as a first etching process, an etching process was performed for 60 seconds with the electrolytic solution after anodization. Subsequently, as the second etching treatment, a pore size treatment was performed with a 1.0 M phosphoric acid aqueous solution for 150 seconds. Furthermore, the said process was repeated and these were added and implemented 5 times in total. As a result, an anodized aluminum film was formed on the aluminum substrate. Finally, a fluorine mold release agent was applied and the excess mold release agent was washed to obtain a mold for producing an antireflection film.

[Preparation of resin for antireflection film]
20 parts by weight of dipentaerythritol hexaacrylate (DPHA), 70 parts by weight of Aronix M-260 (trade name; manufactured by Toa Gosei Co., Ltd.), 10 parts by weight of hydroxyethyl acrylate, and lucillin (trade name; manufactured by TPO) as a photoinitiator 3 parts by weight were dissolved to obtain an active energy ray-curable composition (ultraviolet curable resin composition).

[Preparation of antireflection film]
The ultraviolet curable resin composition was coated and filled so that the surface of the antireflection film production mold obtained above was covered and had a thickness of 20 μm, and a light-transmissive substrate having a thickness of 80 μm was formed thereon. After a triacetyl cellulose film (manufactured by Fuji Film Co., Ltd.) was bonded from an oblique direction, the bonded body was pressed with a rubber roller under a load of 10 N / cm. After confirming that the uniform composition was applied to the entire mold, ultraviolet rays were irradiated from the film side with an energy of 2000 mJ / cm ² to cure the ultraviolet curable resin composition. Then, it peeled from the metal mold | die and obtained the antireflection film.

[Lamination on glass or acrylic board]
PDS1 (trade name; manufactured by Panac Co., Ltd.) was used as a non-carrier pressure-sensitive adhesive sheet, and one each of antireflection films bonded to glass or an acrylic plate (transparent substrate 16) was prepared. Thereby, the concavo-convex structure 10 was obtained.

[Production of pattern]
A pattern layer 20 having a predetermined pattern was printed on a part of the surface 17 opposite to the uneven surface 12 of the uneven structure 10 using a commercially available inkjet printer and transparent ink. Thereby, the display body 100 was obtained.

(Example 2)
In the production of the antireflection film, the same procedure as in Example 1 was used except that the light-transmitting substrate used was a polyethylene terephthalate film having a thickness of 125 μm (manufactured by Toray Industries, Inc.), and the weight during bonding was changed to 25 N / cm. The display body 100 was obtained.

(Example 3)
In the production of the antireflection film, the light transmissive substrate to be used was an acrylic film having a thickness of 125 μm (manufactured by Mitsubishi Rayon Co., Ltd.), and the load at the time of bonding was changed to 25 N / cm, as in Example 1, The display body 100 was obtained.

  As a result of observing the display body 100 obtained in Example 1 to Example 3 while changing the observation direction, the pattern suddenly appeared three-dimensionally and was visible when observed from a specific direction.

DESCRIPTION OF SYMBOLS 10 Uneven structure 11 Microprotrusion 12 Uneven surface 13 Top 15 Uneven structure layer 16 Transparent base material 17 Opposite surface of uneven surface 20 Picture layer 100 Display body

Claims (6)

A transparent concavo-convex structure having a concavo-convex surface formed by microprotrusions arranged at intervals equal to or shorter than the shortest wavelength in the visible light band;
A transparent pattern layer provided on a part of the surface opposite to the uneven surface of the uneven structure,
The display body in which the refractive index of the uneven structure and the refractive index of the picture layer are different.   The display body according to claim 1, wherein a refractive index of the pattern layer is higher than a refractive index of the concavo-convex structure.   The display body according to claim 1, wherein the pattern layer is formed using a transparent ink.   The display body according to claim 1, wherein the pattern layer displays a pattern, and the pattern displays information.   The display according to claim 4, wherein the pattern includes a barcode or a two-dimensional code. Forming a concavo-convex structure having a concavo-convex surface formed by microprotrusions arranged at intervals equal to or shorter than the shortest wavelength of the visible light band;
A step of printing a transparent ink on a part of the surface opposite to the uneven surface of the uneven structure to form a pattern layer;
A method for manufacturing a display body comprising: