JP2011002491A - Display body and article with label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display body which attains higher forgery prevention effect.SOLUTION: The display body 10 includes a relief structure part 12 which is formed by arranging recessed parts 12a for diffraction, each showing a recessed revolution parabola shape in the thickness direction of a light transmissive layer 11 from a surface 11b opposite to one surface 11a of the light transmissive layer 11, in a matrix state at a determined pitch P along the surface 11b, and in the surface 11b opposite to one surface 11a of the light transmissive layer 11, a reflection layer 13 is formed on the surface of the relief structure part 12 and a flat region DP3 being another surface other than the relief structure part 12. The pitch of the recessed parts 12a is 200-500 nm, the thickness of the reflection layer 13 is 5-30 nm, and the reflectance is controlled by the thickness of the reflection layer 13.

Description

The present invention relates to a labeled article using a display body having a forgery prevention function and a display body that requires countermeasures against counterfeiting such as gift certificates, checks, magnetic cards, and IC (identification) cards.
It relates to anti-counterfeiting technology.

It is desirable that authentication items such as cash cards, credit cards and passports, and securities such as gift certificates and stock certificates are difficult to counterfeit. Therefore, conventionally, in order to prevent the counterfeiting, such an article has been attached with a label that is difficult to counterfeit or counterfeit and can be easily distinguished from a counterfeit or counterfeit product.
In recent years, the distribution of counterfeit products has been regarded as a problem for items other than certified items and securities. Therefore, the opportunity to apply the above-described anti-counterfeiting technology with respect to certified articles and securities is increasing.

Conventionally, for this purpose, an OVD (optical variable device) that generates a color change (color shift) according to an observation angle or the like has been used. Examples of the OVD include a multilayer film, a hologram, and a diffraction grating.
The multilayer film has a structure in which multiple layers of ceramics and metals having different optical characteristics are laminated. In the multilayer film, by appropriately designing the optical thickness of each layer, interference that strengthens light of a certain wavelength can be generated, and interference that weakens light of another wavelength can be generated. Since the optical path length between the interfaces changes according to the observation angle, when the observation angle is changed, the wavelength of light that causes constructive interference and the wavelength of light that causes destructive interference change. Based on such a principle, the multilayer film causes a color shift corresponding to the observation angle.

A diffractive structure such as a hologram and a diffraction grating is composed of, for example, a fine concavo-convex pattern or a layer provided with a striped refractive index distribution. When illuminated with white light, the diffractive structure emits diffracted light at different angles depending on the wavelength. The diffractive structure causes a color shift because of this spectral action or the like.
Thus, OVD, especially diffractive structures, have a characteristic visual effect. When the diffractive structure is used, a complicated image such as a stereoscopic image or a special decorative image shining in rainbow can be displayed. In addition, as explained below, diffractive structures require advanced techniques for their manufacture.

Holograms can be classified into, for example, volume holograms and relief holograms.
In the production of a volume hologram, interference fringes are recorded three-dimensionally on a layer made of a recording material such as a photosensitive resin. As the volume hologram, a Lippmann hologram is generally used.

When manufacturing a relief hologram, first, an original plate including a resin layer having a fine concavo-convex pattern on its surface is produced by an optical imaging method using laser beam interference or electron beam drawing. Next, a metal stamper is produced from this original plate by electroforming or the like. Thereafter, a thermoplastic resin, a photocurable resin, or the like is applied onto a flat surface of a base material made of polyethylene terephthalate (PET) or the like, and the above-mentioned metal stamper is brought into close contact therewith. In this state, heat or light is applied to cure the resin, and the metallic stamper is peeled from the resin layer to obtain a relief hologram.
For example, the diffraction grating is manufactured by the same method as described for the manufacture of the relief hologram.

Patent Document 1 describes a display body that displays a stereoscopic image using a diffraction grating. Patent Document 2 describes a display body that employs a pixel structure.
When the incident angle of the illumination light to the diffraction grating is fixed and the diffraction grating is illuminated with white light, the color displayed by the diffraction grating is the grating constant of the diffraction grating, that is, the space of the grating lines constituting the diffraction grating. It is determined by the frequency, the angle formed by the observation direction with respect to the normal line of the diffraction grating, and the angle formed by the lattice line with respect to a plane parallel to the observation direction and the normal line of the diffraction grating. Therefore, when the display body is composed of a plurality of pixels, the structure to be adopted for the diffraction grating of each pixel can be specified from the color of the image to be displayed. Employing such a pixel structure facilitates the design of the display body.

  As described above, diffractive structures can provide a characteristic visual effect and require advanced techniques for their manufacture. For this reason, a display body including a diffractive structure may be supported by the above-described article in anticipation of an anti-counterfeit effect. In addition, as described above, the diffractive structure may provide a characteristic visual effect, and thus may be used for general printed materials such as decorative materials, picture books, and catalogs.

US Pat. No. 5,058,992 JP-A-6-82612

As described above, a diffractive structure requires a high level of technology for its manufacture, but with the recent improvement of fine structure analysis technology and the spread of fine processing technology, it is becoming possible to forge a display body including the diffractive structure. . That is, the forgery prevention effect of the display body including the diffractive structure is decreasing.
In addition, with the widespread use of display bodies including a diffractive structure, the peculiarity of visual effects provided by the diffractive structure is decreasing.

  The present invention has been made to solve the conventional problems as described above, and an object of the present invention is to provide a display body that is difficult to forge and that can realize a special visual effect, and a labeled article using the display body. It is to provide.

  In order to achieve the above object, the invention of claim 1 is a display body, wherein either one of a light transmission layer and a diffraction concave portion or a convex portion is formed on all or part of one surface of the light transmission layer. Or a relief structure formed by arranging both at a determined pitch, and a reflective layer formed so as to cover all or part of the relief structure, and the recesses or the projections or the recesses and the projections The pitch of the part is 200 nm or more and 500 nm or less, and the film thickness of all or part of the reflective layer is 5 nm or more and 30 nm or less.

According to a second aspect of the present invention, in the display body according to the first aspect, a flat region where the relief structure portion is not formed is provided on the one surface of the light transmission layer.
According to a third aspect of the present invention, in the display body according to the first or second aspect, the depth of the concave portion or the height of the convex portion constituting the relief structure portion is ½ or more of the pitch. .

  According to a fourth aspect of the present invention, in the display body according to any one of the first to third aspects, the relief structure portion includes a plurality of relief structures, and at least one of the plurality of relief structures. The shape of the concave portion or the convex portion constituting the relief structure, the depth of the concave portion or the height of the convex portion, the pitch of the concave portion or the convex portion, and the arrangement pattern of the concave portion and the convex portion are different from other relief structures. It is characterized by that.

According to a fifth aspect of the present invention, in the display body according to any one of the first to fourth aspects, the thickness of at least a part of the reflective layer is the thickness of the other reflective layer excluding the part of the reflective layer. It is different from each other.
A sixth aspect of the present invention is the display body according to any one of the first to fifth aspects, further comprising a resin layer formed through the reflective layer.

  The invention of claim 7 is an article with a label, comprising the base material and the display body according to any one of claims 1 to 6 provided in at least a partial region of the surface of the base material. It is characterized by that.

In the present invention, unlike the conventional hologram or diffraction grating, it is transparent by realizing high transmittance and low reflectance, and it is difficult to recognize the relief structure portion when observing from the front that is easy to see. In combination with conventional holograms and diffraction gratings, the anti-counterfeiting effect and design are enhanced, and when observing with a large tilt from the front, it is easy to determine authenticity by displaying pictures, characters, symbols, etc. A display body that can be used and an article using the display body can be provided.
In addition, a display body presents information, such as a character, a picture, a design, etc. by a change in light intensity, and can be confirmed by visual observation or machine reading. Further, the term “transparent” indicates a state in which light from the back surface can be observed as transmitted light or an object on the back surface can be observed.

  And, by setting the pitch of either one or both of the concave and convex portions to 200 nm or more and 500 nm or less, the surface area of the concave or convex portions can be increased and the thickness of the reflective layer is thin, so that the high transmittance and low Transparency can be realized from the reflectance.

Further, according to the present invention, the surface opposite to the light incident surface of the light transmission layer has a flat region where the relief structure portion is not formed, so that the transparency of the relief structure portion and the specular reflection of the flat region are arranged. High contrast can be expressed.
Further, according to the present invention, the depth of the concave portion or the height of the convex portion constituting the relief structure portion is ½ or more of the pitch, thereby increasing the surface area of the relief structure portion and higher transmittance. It becomes possible to achieve transparency.

  In addition, according to the present invention, the shape of the concave portion or the convex portion, the depth of the concave portion or the height of the convex portion, the concave portion or the convex portion constituting at least one relief structure among the plurality of relief structures. By making the pitch and the arrangement pattern of the concave and convex portions different from those of other relief structures, it is difficult to identify the difference between the relief structures in the easy-to-see front view, and the observation is performed with a large tilt from the front. In addition, since it becomes possible to identify by the difference in diffracted light, the forgery prevention effect can be enhanced.

Further, according to the present invention, since the thickness of at least a part of the reflective layer is different from the thickness of the other reflective layer excluding the part of the reflective layer, only the difference in the shape of the relief structure part or the flat part is obtained. In addition, regions having different reflectivities and transmissivities can be produced even when the thickness of the reflective layer is different.
Moreover, according to this invention, a relief structure part can be protected by providing the resin layer formed through the reflection layer in the surface opposite to the said light-incidence surface of a light transmissive layer.

It is a perspective view for explanation showing an example of a relief structure part of a display concerning the present invention. It is sectional drawing of the relief structure part which follows the AA 'line of FIG. It is explanatory drawing when observing area | region DP1 which is a relief structure part of the display body concerning this invention. It is a graph which shows the relationship between the film thickness of the normal line direction in the reflective layer of the display body concerning this invention, and a reflectance / transmittance. It is a top view which shows roughly an example of the whole structure of the display body concerning this invention. It is a top view which shows roughly the other example of the whole structure of the display body concerning this invention. It is sectional drawing of the relief structure part which follows the BB 'line | wire of FIG. It is a graph which shows the thickness of the reflection layer which covers the relief structure part along the BB 'line shown in FIG. It is a top view which shows roughly an example of the labeled article which attaches the display body concerning this invention to a printed matter main body as a label for forgery prevention or an identification. It is sectional drawing which shows roughly an example in the case of attaching the display body concerning this invention to a printed matter main body through the adhesion layer. It is a perspective view which shows roughly the structural example of the recessed part (or convex part) which comprises the relief structure part of the display body concerning this invention. It is a perspective view which shows roughly another structural example of the recessed part (or convex part) which comprises the relief structure part of the display body concerning this invention. It is a perspective view which shows roughly another structural example of the recessed part (or convex part) which comprises the relief structure part of the display body concerning this invention. It is a perspective view which shows roughly another structural example of the recessed part (or convex part) which comprises the relief structure part of the display body concerning this invention. It is a perspective view for explanation which shows other examples of the relief structure part of a display concerning the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. In addition, in each figure, the same referential mark is attached | subjected to the component which exhibits the same or similar function, and the overlapping description is abbreviate | omitted.

As shown in FIGS. 1 and 2, the display body 10 according to the present embodiment includes a flat light-transmitting layer 11 having a constant thickness. A relief structure 12 is formed on the whole or a part of the surface 11b opposite to the one surface 11a of the light transmission layer 11 so as to be able to discriminate true / false by visual observation.
The relief structure unit 12 selectively realizes two functions of color display with low brightness and saturation and emission of diffracted light depending on the observation angle. As shown in FIG. 1 and FIG. The concave portions 12a having a concave parabolic shape in the thickness direction of the light transmission layer 11 from the opposite surface 11b are arranged in a matrix at a predetermined pitch P along the opposite surface 11b (XY plane). It is constituted by doing. The depth from the opposite surface 11b of each recess 12a is H.
In addition, the reflective layer 13 is formed in the flat region DP3 which is the surface 11b opposite to the one surface 11a of the light transmission layer 11 and the other surface excluding the relief structure portion 12, respectively. . Furthermore, a resin layer 15 is provided on the surface 11 b opposite to the one surface 11 a of the light transmission layer 11 via the reflective layer 13.
The reflective layer 13 is for reflecting the illumination light incident from one surface 11a and transmitted through the interface with the recess 12a and the interface of the flat region DP3 toward the light incident surface 11a.

The light transmission layer 11 may be composed of one layer or may be composed of a plurality of layers.
Moreover, the material which comprises the light transmissive layer 11 is not specifically specified, What is necessary is just to transmit light in visible light, and materials, such as transparent resin, can be used. For example, the recess 12a can be formed by transfer using a mold using a thermoplastic resin or a photo-curable resin.
As the reflective layer 13, for example, aluminum, silver, gold, or an alloy thereof can be used, and can be formed by a method such as vapor deposition or sputtering.

In the display body 10 configured as described above, first, as shown in FIG. 3, at the time of observing the region DP1 having the relief structure portion 12, the recess 12a of the relief structure portion 12 is covered with the reflective layer 13a. Since the cross-sectional area of the reflective layer 13a can be increased, and it has high transmittance and low reflectance, it is possible to realize transparency.
Therefore, when the viewer VW1 observes the region DP1 having the relief structure 12 of the display body 10 in front, the regular reflection light L _R 1 of the illumination light L _I is reduced from the light source LS, and the light L _T from the back surface. Since the transmitted light L _T 1 is large, it becomes transparent. Further, when there is a ground, since the ground is observed, it is difficult to visually observe the relief structure 12.
Further, by setting the pitch P, which is the center-to-center distance of the relief structure portion 12, to 200 nm to 500 nm, the diffracted light L _D 1 by the relief structure portion 12 is not generated in the front direction of the display body, and the observer VW2 Since the diffracted light is generated at a large angle with respect to the front direction, it is possible to display a pattern, characters, symbols, and the like by the diffracted light only when observed with a large tilt from the front.

Next, changes in the reflectance and transmittance of the relief structure due to the difference in film thickness in the normal direction between the reflective layers 13a and 13b will be described with reference to FIG.
FIG. 5 shows a rotating parabolic concave portion 12a shown in FIGS. 1 and 2 (depth H is 400 nm, center-to-center pitch P is 300 nm), and rotating parabolic concave portion 12a (depth H is 400 nm). And the reflection layer 13 made of aluminum (Al) in which each flat region DP3 is provided in a square lattice shape, the reflectivity of normal incidence by the FDTD (finite difference time domain) method. , Data obtained by performing a transmittance simulation at a light wavelength of 532 nm.

From this simulation result, when the thickness of the reflective layer 13 is 5 nm or more and 30 nm or less, the reflectance at the rotating parabolic recess 12a is 5% or less, the transmittance is 10% or more, and the reflectance of the flat region is aluminum. The transmittance increases with the thickness of (Al), and the transmittance decreases.
In this range, the reflectance and transmittance of the flat region can be controlled by controlling the thickness of the reflective layer by showing substantially the same reflectance and transmittance regardless of the difference in the concave paraboloid 12a. it can. For this reason, the difference in the relief structure 12 cannot be identified from the difference in brightness by observation from the front that is easy to see. Therefore, the difference of the relief structure part 12 can be hidden. In order to confirm the difference in the relief structure 12, it is necessary to observe with a large inclination from the front, and to observe the diffracted light of different wavelengths generated by the difference in the pitch P, which is the distance between the centers. Alternatively, the forgery prevention effect can be enhanced because the fine structure must be directly analyzed.

Next, specific embodiments of a display body and an article using the display body according to the present invention will be described with reference to the drawings.
(Embodiment 1)
In FIG. 5, DP1 is a region composed of a rotational parabolic concave portion 12a (depth H is 400 nm, and the pitch P as the center-to-center distance is 300 nm), and DP2 is a rotational parabolic concave portion 12a (depth H is equal to 300 nm). 400 nm and the pitch P which is the distance between the centers is 400 nm). DP3 is a flat region which is a part of the opposite surface 11b. In addition, 25 nm of Al is deposited on the display body 10 as a reflective layer 13 as a whole.
As the reflective layer 13, for example, a metal material such as aluminum, silver, gold, and alloys thereof, or a metal layer made of metal ink can be used. Alternatively, as the reflective layer 13, a dielectric layer having a refractive index different from that of light transmission may be used. Alternatively, as the reflective layer 13, a laminate of dielectric layers having different refractive indexes between adjacent ones, that is, a dielectric multilayer film may be used. However, the refractive index of the dielectric layer included in the dielectric multilayer film that is in contact with the light transmission layer needs to be different from the refractive index of the light transmission layer.

The display body 10 of the present invention is an illumination light L _I angle 30 degrees from the likewise light source LS and Fig. 4, when the observer VW1 was observed in the specular direction, light reflected from the region DP1, DP2 are weak (Fig. It is difficult to identify the difference). In addition, since the reflected light from the region DP3 serving as a mirror surface has a high reflectance with respect to the regions DP1 and DP2, an image with high contrast is displayed.
Next, when the observer VW2 observes with a large tilt from the front (observation angle 70 degrees), the blue diffracted light L _D 1 (wavelength 432 nm) is emitted from the region DP1, and the yellow diffracted light L _D 1 is emitted from the region DP2. (Wavelength 576 nm) can be observed, and the regions DP1 and DP2 can be identified. Further, the flat region DP3 becomes dark. By having the above-mentioned special visual effect, it becomes possible to enhance the forgery prevention effect and to easily perform the deliberation judgment of the display body.

(Embodiment 2)
The display body 10 shown in FIG. 6 includes regions DP1, DP2a, DP2b, and a flat region DP3, as in the case shown in FIG. In this case, as shown in FIGS. 7 and 8, the thickness of aluminum Al coated as a reflective layer in each region is continuously changed from 5 nm to 50 nm.
In the region DP2a, the thickness of the reflective layer 13 continuously changes from 5 nm to 30 nm. Therefore, as shown in FIG. 4, it is difficult to recognize the change in reflectance in the region DP2a. However, the reflectance can be continuously changed in the flat region DP3. In the region DP2b, the thickness of the reflective layer 13 varies from 40 nm to 50 nm, and the reflectance continuously varies as shown in FIG. 4, so that gradation can be expressed. However, since there is no difference in the relief structure 12, no difference appears in the analysis of the relief structure 12. Since the flat region DP3 has substantially the same reflectance regardless of the difference in the thickness of the reflective layer 13, it is difficult to recognize the difference in the thickness of the reflector 13, and the forgery prevention effect can be enhanced. .

(Embodiment 3)
FIG. 9 shows an example of a labeled article obtained by attaching an anti-counterfeiting or identification label to the article, and a printed matter is drawn as an example of the labeled article. This printed material is an ID (identification) card and includes a printed material main body 20.
The printed material main body 20 includes a base material 210. The base 210 is made of plastic, for example. A printed layer 220 is formed on the substrate 210. The display body 10 described above is fixed to the surface of the substrate 210 on which the printed layer 220 is formed, for example, via the adhesive layer 30. The display body 10 is fixed to the base material 210, for example, by being attached via the adhesive layer 30 or the adhesive layer.
This printed matter includes the display body 10. Therefore, counterfeiting or imitation of this printed matter is difficult. In addition, since the printed matter includes the display body 10, it is easy to discriminate between an authentic product and a non-authentic product for an article whose authenticity is unknown. In addition, since the printed matter 20 further includes a printed layer 220 in addition to the display body 10, a forgery prevention measure using the printed layer 220 can be employed.

  In FIG. 9, an ID card is illustrated as a printed material including the display body 10, but the printed material including the display body 10 is not limited thereto. For example, the printed matter including the display body 10 may be other cards such as a magnetic card, a wireless card, and an IC (Integrated Circuit) card. Alternatively, the printed matter 20 including the display body 10 may be securities such as gift certificates and stock certificates. Alternatively, the printed matter 20 including the display body 10 may be a tag to be attached to an article to be confirmed as a genuine product. Alternatively, the printed matter including the display body 10 may be a package body that contains an article to be confirmed to be genuine or a part thereof.

Moreover, in the printed matter 20 shown in FIG. 9, although the display body 10 is affixed on the base material 40, the display body 10 can be supported on a base material by another method. For example, when paper is used as the base material, the display body 10 may be rolled into the paper and the paper may be opened at a position corresponding to the display body 10. Alternatively, when a light-transmitting material is used as the base material, the display body 10 may be embedded therein, or the display body 10 may be fixed to the back surface of the base material, that is, the surface opposite to the display surface. .
Moreover, the labeled article may not be a printed material. That is, the display body 10 may be supported on an article that does not include a printed layer. For example, the display body 10 may be supported by a luxury product such as a work of art.
The display body 10 may be used for purposes other than forgery prevention. For example, the display body 10 can be used as a toy, a learning material, or a decoration.
For the production of these labeled articles, for example, an adhesive label or a transfer foil can be used.

(Embodiment 3)
FIG. 10 schematically shows an example of an adhesive label, and the adhesive label includes the display body 10 and the adhesive layer 30 described above. The pressure-sensitive adhesive layer 30 is provided so as to cover the back surface opposite to the display surface of the display body 10, and can be bonded to a printed material body (not shown) via the pressure-sensitive adhesive layer 30. In addition, the pressure-sensitive adhesive label having such a pressure-sensitive adhesive layer 30 may further include release paper that covers the surface of the pressure-sensitive adhesive layer 30 opposite to the side bonded to the display body 10 in a peelable manner.
The display body 10 described above can be variously modified. For example, the previous display 10 includes only the two display areas DP1 and DP2 as a display including a relief structure formed by two-dimensionally arranged parabolic recesses 12a. The body 10 may include three or more such display units. Further, the relief structure 12 may be a diffraction grating arranged one-dimensionally.
Moreover, although the example where the recessed part 12a is the recessed part 12a of the rotation parabola shape was demonstrated here, the shape of these relief structure parts is not restricted to the recessed part of a rotation parabola shape.

(Embodiment 4)
The recess 12a constituting the relief structure 12 has a cylindrical shape as shown in FIG. 11, a truncated conical cylinder shape as shown in FIG. 12, a quadrangular pyramid shape as shown in FIG. 13, and a half shape as shown in FIG. An elliptic cylinder may be used. Moreover, you may have the shape which combined the recessed part which exhibits the said cylindrical shape, truncated cone cylinder shape, quadrangular pyramid cylinder shape, and semi-elliptical cylinder shape, or the shape which deform | transformed these.

(Embodiment 5)
The relief structure 12 of the display body 10 according to the present invention is not limited to the one constituted by the recess 12a as described in the above embodiment. For example, as shown in FIG. 15, the surface 11b opposite to the one surface 11a of the light transmission layer 11 has a convex rotating parabolic shape protruding from the opposite surface 11b in the direction opposite to the one surface 11a. The diffractive convex portions 12b are formed in a matrix at a predetermined pitch along the opposite surface 11b, whereby the relief structure portion 12 is configured. The flat surface DP3 which is the surface 11b opposite to the one surface 11a of the light transmission layer 11 and the other surface excluding the relief structure 12 is shown in FIGS. A reflective layer (not shown) having the same film thickness as the display body is formed. Furthermore, a resin layer 15 is provided on the surface 11b side opposite to the one surface 11a of the light transmission layer 11 via a reflective layer.
Even when the display body 10 is configured using the relief structure portion 12 formed of such a convex portion 12b, the same effects as the display body shown in FIGS. 1 and 2 can be obtained.
Further, the convex portion 12b has a shape obtained by combining convex portions having a convex cylindrical shape, a truncated conical column shape, a quadrangular pyramid column shape, and a semi-elliptical column shape, which are the opposite shapes to those shown in FIGS. Or a shape obtained by deforming them.

In the above embodiment, the case where the relief structure portion 12 of the display body 10 is configured by either the concave portion 12a or the convex portion 12b has been described. However, the present invention is not limited to this, and the light transmitting layer 11 One or both of the concave portion 12a and the convex portion 12b may be arranged at a predetermined pitch on the surface 11b opposite to the light incident surface 11a.
Further, in the present invention, the relief structure 12 is composed of a plurality of relief structures, and the shape of the recesses or protrusions constituting the at least one relief structure of the plurality of relief structures, the depth of the recesses. Or you may make it the structure from which the height of a convex part, the pitch of a recessed part or a convex part, and the arrangement pattern of a recessed part and a convex part differ from another relief structure.

DESCRIPTION OF SYMBOLS 10 ... Display body, 11 ... Light transmissive layer, 11a ... Light incident surface, 11b ... Other surface (flat surface), 12 ... Relief structure part, 12a ... Concave part 12a ... Convex part, 13 ... Reflective layer, 13a ... Uneven structure , Reflective layer covering the flat part, 20 ... printed body, 30 ... adhesive layer, 40 ... base material, 210 ... base material, 220 ... printed layer, DP1 ... area of relief structure part, DP2 ... concave part 12a region, DP3 ... flat region, L _D 1 ... diffracted light, L _R 1 ... reflected light, LS ... light source, L _I ... illumination light, L _T ... light from the back surface, L _T 1 ... transmitted light, P ... Distance between centers, Ta: film thickness in the normal direction of the reflective layer covering the relief structure portion, Tb: film thickness in the normal direction of the reflective layer covering the flat portion, VW1: observer, VW2: observer.

Claims (7)

A light transmissive layer;
A relief structure part formed by arranging one or both of a concave part and a convex part for diffraction on a whole or a part of one surface of the light transmission layer at a determined pitch;
A reflective layer formed so as to cover all or part of the relief structure;
The pitch between the recesses or between the projections or between the recesses and the projections is 200 nm or more and 500 nm or less,
The thickness of all or part of the reflective layer is 5 nm or more and 30 nm or less.
A display body characterized by that.   The display body according to claim 1, further comprising a flat region where the relief structure portion is not formed on the one surface of the light transmission layer.   The display body according to claim 1 or 2, wherein the depth of the concave portion or the height of the convex portion constituting the relief structure portion is ½ or more of the pitch.   The relief structure portion is composed of a plurality of relief structures, and the shape of a recess or projection, the depth of the recess, or the height of the projection constituting at least one relief structure of the plurality of relief structures. The display body according to any one of claims 1 to 3, wherein a pitch of the concave portions or convex portions and an arrangement pattern of the concave portions and convex portions are different from those of other relief structures.   5. The display body according to claim 1, wherein the thickness of at least a part of the reflective layer is different from the thicknesses of the other reflective layers excluding the part of the reflective layer.   The display body according to claim 1, further comprising a resin layer formed through the reflective layer. A substrate;
The display body according to any one of claims 1 to 6, provided in at least a partial region of the surface of the base material,
A labeled article characterized by the above.

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