JP5163137B2 - Display body and article with display body - Google Patents

Description

  The present invention relates to a display technology that provides, for example, an anti-counterfeit effect, a decorative effect, and / or an aesthetic effect.

  Diffractive structures such as holograms and diffraction gratings require special techniques for their manufacture and provide visual effects that cannot be reproduced by printing. Therefore, as described in Patent Document 1, articles such as banknotes, securities, and credit cards may support a display body including a diffractive structure for the purpose of preventing counterfeiting.

However, with the development of replication technology in recent years, it is becoming easier to forge a display body including a diffractive structure. Moreover, it may be difficult to distinguish between a counterfeit product and a genuine product through observation with the naked eye.
JP-A-7-191604

  An object of the present invention is to realize a display body that is difficult to forge and can provide a special visual effect.

According to the first aspect of the present invention, a relief structure forming layer in which a diffractive structure composed of a plurality of recesses or projections two-dimensionally arranged at a pitch of 500 nm or less is provided on one main surface, and a metal or an alloy. A reflective layer covering the diffractive structure, the reflective layer is formed by oblique vapor deposition or oblique sputtering, and each of the plurality of regions corresponding to the plurality of concave portions or convex portions of the reflective layer has a thickness. A display body comprising a first portion having a thickness of 50 nm or more and a second portion as an opening or a portion having a thickness of 10 nm or less is provided.

  According to the 2nd side surface of this invention, the display body with a display body characterized by having comprised the display body which concerns on the 1st side surface, and the articles | goods which supported this is provided.

  According to the present invention, a display body that is difficult to counterfeit and can provide a special visual effect is realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 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.

  FIG. 1 is a plan view schematically showing a display body according to one aspect of the present invention. FIG. 2 is an enlarged perspective view showing a part of the display body shown in FIG. FIG. 3 is a cross-sectional view taken along line III-III of the display shown in FIG. 4 is an enlarged cross-sectional view showing a part of the structure shown in FIG. In FIGS. 1 to 4, directions parallel to the display surface and orthogonal to each other are defined as an X direction and a Y direction, and a direction perpendicular to the display surface is defined as a Z direction.

  Note that FIG. 1 illustrates a state in which the display body 10 is observed from the display surface side. On the other hand, FIG. 2 illustrates a state in which the display unit indicated by reference numeral DP1 in the display body 10 is observed from the back side.

  As shown in FIGS. 2 to 4, the display body 10 includes a laminate of a relief structure forming layer 110 and a reflective layer 120. Here, as an example, the relief structure forming layer 110 side is the front side, and the reflective layer 120 side is the back side.

  A concave structure and / or a convex structure is provided on one main surface of the relief structure forming layer 110. Here, as an example, a plurality of concave portions 110 </ b> R are provided as a concave structure and / or a convex structure on one main surface of the relief structure forming layer 110.

  The front main surface of the relief structure forming layer 110 includes a region where a plurality of recesses 110 </ b> R are provided and a region where the uneven structure is not provided. In the display body 10, the portion corresponding to the region where the plurality of concave portions 110R are provided and the portion corresponding to the region where the uneven structure is not provided are the display portions DP1 and DP2 shown in FIG.

  The recess 110R is typically tapered. For example, the recess 110R has a conical shape, a pyramid, a truncated cone, a truncated pyramid, an elliptic paraboloid or a rotating paraboloid. The side wall of the recess 110R may be smooth or may have a stepped shape. Alternatively, the recess 110R may be a cylinder or a prism. Here, as an example, the recess 110R has a paraboloidal shape.

  The recesses 110R are two-dimensionally arranged and form a diffraction structure such as a diffraction grating and a hologram. Here, as an example, the recesses 110 </ b> R are arranged in a square lattice shape along the X direction and the Y direction to form a diffraction grating. The array of the recesses 110R may form a lattice other than a square lattice. For example, the arrangement of the recesses 110R may form a triangular lattice.

  The pitch P of the array of the recesses 110R is 500 nm or less, and typically 400 nm or less. In this case, the display unit DP1 does not emit the first-order diffracted light in the Z direction, or the first-order diffracted light emitted from the display unit DP1 in the Z direction can be only light having a wavelength with low visibility.

  The pitch P is, for example, 300 nm or more, and typically 330 nm or more. When the pitch P is small, the display body 10 does not emit the first-order diffracted light, or the first-order diffracted light emitted from the display body 10 is only light having a wavelength with low visibility.

  It should be noted that the position of the tip of the recess 110R is more likely to vary than the position of the opening of the recess 110R. Therefore, the pitch P is determined based on the arrangement formed by the openings of the recesses 110R.

  The dimension in the Z direction of the recess 110R, that is, the depth D is, for example, in the range of 200 nm to 500 nm, and typically in the range of 250 nm to 450 nm. The maximum diameter R of the recess 110R is, for example, in the range of 300 nm to 500 nm, and typically in the range of 330 nm to 400 nm.

  The ratio D / R of the depth D to the maximum diameter R is, for example, in the range of 0.400 to 1.667, and typically in the range of 0.625 to 1.364. When the ratio D / R is decreased, the reflectance of the display body 10 in the Z direction is increased. When the ratio D / R is increased, it becomes difficult to form the concave portion 110R with high shape accuracy, and the diffraction efficiency is lowered.

  The relief structure forming layer 110 can be formed, for example, by pressing a mold provided with fine convex portions against a resin. For example, the relief structure forming layer 110 is obtained by a method in which an original plate provided with convex portions is pressed against a thermoplastic resin layer provided on a substrate while applying heat, that is, a heat embossing method. Alternatively, the relief structure forming layer 110 may be formed by applying an ultraviolet curable resin on a substrate, irradiating the substrate with ultraviolet rays while curing the ultraviolet curable resin while pressing the original, and then removing the original. It is also possible to form.

  This original plate is manufactured using, for example, an electron beam drawing apparatus. Usually, a reverse plate is manufactured by transferring the concavo-convex structure of the original plate, and a duplicate plate is manufactured by transferring the concavo-convex structure of the reverse plate. Then, if necessary, a reversal plate is manufactured using the copy plate as an original plate, and the uneven structure of the reversal plate is transferred to further manufacture a copy plate. In actual production, a copy obtained in this way is usually used.

  As a material of the relief structure forming layer 110, for example, a transparent material can be used. Further, the relief structure forming layer 110 may have a single layer structure or a multilayer structure. For example, plastic materials such as polyethylene terephthalate (PET) and polycarbonate are used as the material of the previous substrate, and acrylic resin, polycarbonate resin, styrene resin, acrylic / polyethylene resin as the previous thermoplastic resin or ultraviolet curable resin. A styrene copolymer resin may be used. Alternatively, an inorganic material containing silicate may be used.

  A surface treatment such as an antireflection treatment, a hard coat treatment, an antistatic treatment, and an antifouling treatment may be performed on the back surface of the relief structure forming layer 110 provided with the recess 110R.

  The reflective layer 120 covers the whole or part of the main surface provided with the concave structure and / or convex structure of the relief structure forming layer 110.

  As a material of the reflective layer 120, for example, a metal or an alloy can be used. As this metal or alloy, for example, aluminum, silver, platinum, nickel, or an alloy thereof can be used.

  Each region of the reflective layer 120 corresponding to the recess 110R is light-shielding or has a lower light transmittance, and a second portion 120b as an opening or a portion having a higher light transmittance. Including. Only a part of the side wall of each recess 110R is covered with the first portion 120a. The second portion 120b faces the other part of the side wall of each recess 110R.

  Typically, the relative position of the first portion 120a with respect to the recess 110R is equal to each other between the previous regions. In addition, typically, the relative position of the second portion 120b with respect to the recess 110R is equal between the previous regions.

  The thickness of the first portion 120a is 50 nm or more. On the other hand, the second portion 120b is an opening or a portion having a thickness of 10 nm or less. As will be described later, when the thickness is 50 nm or more, high light absorptance and light reflectance can be achieved, and when the thickness is 10 nm or less, high light transmittance can be achieved. Here, as an example, it is assumed that the second portion 120b is an opening.

  The reflective layer 120 can be formed by, for example, a vapor deposition method. For example, it can be formed by oblique vapor deposition or oblique sputtering.

  When the front surface of the display body 10 is illuminated with white light, for example, an image described below is displayed.

  FIG. 5 is a plan view schematically showing an example of an image displayed by the display shown in FIGS. 1 to 4 when observed from a direction perpendicular to the display surface while being illuminated with white light.

  As described above, in the display portion DP1, the fine concave portions 110R arranged two-dimensionally are provided on the main surface of the relief structure forming layer 110 on the reflective layer 120 side. Therefore, the light incident on the display unit DP1 is reflected a plurality of times at the interface on the reflective layer 120 side of the relief structure forming layer 110.

  Of the interface, in the region corresponding to the first portion 120a, a part of the incident light is absorbed by the first portion 120a. In addition, a part of the incident light is transmitted through a region corresponding to the second portion 120b in the interface. As a result, most of the incident light is absorbed or transmitted, and the display unit DP1 does not emit reflected light in the direction perpendicular to the display surface or emits very weak reflected light.

  Since the pitch of the diffractive structure is 500 nm or less, the diffracted light is not emitted in the direction perpendicular to the display surface or the diffracted light emitted in the direction perpendicular to the display surface has a wavelength with low visibility. Only light. Accordingly, the display unit DP1 displays black.

  In the display unit DP2, the interface between the relief structure forming layer 110 and the reflective layer 120 is flat. Therefore, when the specularly reflected light can be observed, the display unit DP2 displays white as the light source color.

  Accordingly, when viewed from the Z direction, the display 10 displays an image that looks like a print pattern formed by the display unit DF1 using black ink.

  FIG. 6 is a perspective view schematically showing an example of an image displayed by the display shown in FIGS. 1 to 4 when observed from diagonally forward to the display surface while illuminating with white light. FIG. 7 is a perspective view schematically showing an example of an image displayed by the display shown in FIGS. 1 to 4 when observed from the diagonally left front with respect to the display surface while illuminating with white light. FIG. 6 shows an image that can be visually recognized by the observer VW1 shown in FIG. FIG. 7 depicts an image that is visible to the viewer VW2 shown in FIG.

  As shown in FIG. 4, the reflective layer 120 includes a first portion 120a and a second portion 120b. Of the interface on the reflective layer 120 side of the relief structure forming layer 110, the region corresponding to the first portion 120a has a higher reflectance than the region corresponding to the second portion 120b.

  Therefore, under a specific pitch P and a specific lighting condition, when the observer observes the display body 10 from a direction substantially facing the first portion 120a, the observer is substantially positive with the second portion 120b. Compared with the case where the display body 10 is observed from the opposite direction, diffracted light having a stronger intensity is perceived. That is, the observer VW1 shown in FIG. 3 perceives diffracted light having a stronger intensity than the observer VW2 shown in FIG.

  Accordingly, the display unit DP1 appears colored to the viewer VW1 as shown in FIG. Then, for the viewer VW2, the display unit DP1 looks black as shown in FIG. 7, for example.

  Thus, the display portion DP1 of the display body 10 looks like a printed pattern formed using black ink when observed from the normal direction, and appears colored when observed from a certain oblique direction. . Then, when the display body 10 is rotated 180 ° around the normal line with the observation angle kept constant, the colored display portion DP1 changes to black. Such a color change cannot be reproduced with a normal diffraction grating or hologram.

  Moreover, since the concave portion 110R is fine, it is difficult for those who perform fraud to analyze the structure thereof. And even if those structures can be analyzed, it is extremely difficult to reproduce this fine structure. That is, the display body 10 is difficult to counterfeit and provides a special visual effect.

  When the second portion 120b is omitted, that is, when a continuous film having a substantially uniform thickness is formed as the reflective layer 120, the reflective layer 120 cannot sufficiently absorb incident light if the ratio D / R is small. The display unit DP1 displays a dark tone color or gray when observed from the normal direction. When the ratio D / R is increased, it becomes difficult to form the concave portion 110R with high shape accuracy, and the diffraction efficiency is lowered.

  When the reflective layer 120 includes the second portion 120b, a part of the incident light is transmitted to the back side of the reflective layer 120. Therefore, even if the ratio D / R is relatively small, the display unit DP1 is not in the normal direction. Black color can be displayed when observed. If the ratio D / R is sufficiently small, high diffraction efficiency can be achieved for a specific emission direction. That is, when the second portion 120b is provided on the reflective layer 120, a black image is displayed on the display unit DP1 when observed from the normal direction, and a bright colored image is displayed when observed from a specific oblique direction. It becomes possible.

  As described above, high light absorption and light reflectance can be achieved when the thickness of the reflective layer 120 is 50 nm or more, and high light transmittance can be achieved when the thickness is 10 nm or less. This will be described below.

  8 to 10 are graphs showing examples of the influence of the thickness of the reflective layer on the optical characteristics. In the figure, the horizontal axis indicates the thickness of the reflective layer, and the vertical axis indicates the reflectance, transmittance, or absorption of the reflective layer as a percentage.

  8 to 10 show data obtained by the FDTD method (fine difference time domain method) widely used for optical simulation. Specifically, FIG. 8 shows data for blue light, FIG. 9 shows data for green light, and FIG. 10 shows data for red light. This calculation is performed assuming that the material of the reflective layer is aluminum.

  As is apparent from FIGS. 8 to 10, in the visible light region, if the film thickness is 10 nm or less, the transmittance is high and the reflectance is small. And if a film thickness is 50 nm or more, a reflectance will be large and it will hardly receive to the influence of a film thickness. Although data obtained for aluminum is shown here, similar results are obtained for other metals.

  The area ratio of the region corresponding to the second portion 120b in the surface of the recess 110R is, for example, less than about 50%. Moreover, this area ratio shall be about 25% or more, for example. When this area ratio is large, it is difficult to visually recognize the colored image described with reference to FIG.

The display body 10 described above can be variously modified.
FIG. 11 is a plan view schematically showing a display body according to a modification.
The display body 10 is the same as the display body 10 shown in FIGS. 1 to 4 except that the following configuration is adopted. That is, the display body 10 shown in FIG. 11 further includes a display unit DP3. Of the main surface of the relief structure forming layer 110 on the reflective layer 120 side, a diffraction grating including a plurality of grooves is provided in a region corresponding to the display portion DP3. As described above, the display body 10 may further include a fine structure such as a diffraction structure composed of a plurality of grooves, or a scattering structure composed of a plurality of concave portions or convex portions irregularly arranged so as to cause light scattering. Good.

FIG. 12 is a plan view schematically showing a display body according to another modification.
The display body 10 is the same as the display body 10 shown in FIGS. 1 to 4 except that the following configuration is adopted. That is, the display body 10 shown in FIG. 12 includes display units DP1a and DP1b instead of the display unit DP1.

  The display unit DP1a has the same structure as the display unit DP1. The display portion DP1b has the same structure as the display portion DP1a except that the relative position of the first portion 120a with respect to the recess 110R and the relative position of the second portion 120b with respect to the recess 110R are different from the display portion DP1a. doing. Here, as an example, it is assumed that the display unit DP1a has a structure shown in FIG. 4, and the display unit DP1b has a structure obtained by horizontally inverting the structure shown in FIG. In the reflective layer 120, each of a portion corresponding to the display portion DP1a and a portion corresponding to the display portion DP1b is referred to as a “reflecting portion”.

  FIG. 13 is a perspective view schematically showing an example of an image displayed by the display body shown in FIG. 12 when observed from diagonally right on the display surface while illuminating with white light. FIG. 14 is a perspective view schematically showing an example of an image displayed by the display body shown in FIG. 12 when observed from diagonally left front with respect to the display surface while illuminating with white light.

  When the display body 10 shown in FIG. 12 is illuminated with white light while observing the display surface obliquely from the front right, as shown in FIG. 13, the display portion DP1a appears colored and the display portion DP1b appears black. And when this display body 10 is observed from the diagonally left front with respect to the display surface while illuminating with white light, as shown in FIG. 14, the display portion DP1a appears black and the display portion DP1b appears colored. That is, the display color can be changed between the display portions DP1a and DP1b by changing the observation direction.

  The diffractive structure provided on the main surface of the relief structure forming layer 110 on the reflective layer 120 side may include a plurality of diffractive structure portions in which at least one of the shape, pitch, and arrangement direction of the concave portions 110R is different. In this way, a more complex image can be displayed on the display body 10.

  The 2nd part 120b does not need to be provided in the position of the side wall of the recessed part 110R. For example, the second portion 120b may be provided at a boundary position between the adjacent recesses 110R.

  A convex portion may be provided instead of the concave portion 110R. In this case, the same effect as described above can be obtained.

  The display body 10 described above can be used, for example, as a forgery prevention or identification label. Since the display body 10 is difficult to forge or imitate, when the display body 10 is supported on an article, it is also difficult to forge or imitate the genuine article with the display body. In addition, since the display body 10 has the above-described visual effect, it is easy to determine an article whose authenticity is unknown between a genuine product and a non-genuine product.

FIG. 15 is a plan view schematically showing an example of an article with a display body.
FIG. 15 shows a printed matter 100 as an example of an article with a display body. The printed material 100 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 an adhesive layer. The display body 10 is fixed to the base material 210, for example, by being attached via an adhesive layer or an adhesive layer.

  The printed material 100 includes a display body 10. Therefore, counterfeiting or imitation of this printed matter is difficult. In addition, since the printed matter 100 includes the display body 10, it is easy to discriminate between a genuine product and a non-authentic product for an article whose authenticity is unknown. Moreover, since the printed material 100 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. 15, an ID card is illustrated as the printed material 100 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 including the display body 10 may be securities such as gift certificates and stock certificates. Alternatively, the printed matter 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.

  Further, in the printed matter 100 shown in FIG. 15, the display body 10 is attached to the base material 20, but the display body 10 can be supported on the base material by other methods. 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. .

  Further, the article with a display body may not be a printed matter. 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.

  In addition, an adhesive label or transfer foil can be utilized for manufacture of these articles | goods with a display body, for example.

Examples of the present invention will be described below.
(Example)
In this example, the display body 10 shown in FIGS. 1 to 4 was manufactured by the following method.
First, an ultraviolet curable resin was applied onto a PET film having a thickness of 75 μm. Next, the ultraviolet curable resin was cured by irradiating ultraviolet rays from the PET film side while pressing the original plate having a plurality of convex portions on the plate surface against the previous coating film. Then, the relief structure forming layer 110 was obtained by removing the original plate. Here, the depth D of the recess 110R is 350 nm, and the pitch P and the maximum diameter R are 300 nm.

  Next, the reflective layer 120 was formed by depositing aluminum on the main surface of the relief structure forming layer 110 on the concave portion 110R side by vacuum vapor deposition. Specifically, the relief structure forming layer 110 was placed in a vacuum vapor deposition apparatus so that its main surface was inclined with respect to the horizontal, thereby depositing aluminum from an oblique direction with respect to the previous main surface. .

  The reflective layer 120 included a first portion 120a having a thickness of about 100 nm and a second portion 120b as an opening. Moreover, the area ratio of the area | region corresponding to the 2nd part 120b among the surfaces of the recessed part 110R was 30%.

  When the display body 10 thus obtained was observed from the normal direction, the display portion DP1 appeared black. Further, when the display body 10 was tilted and observed, the display portion DP1 appeared to be colored.

  Next, this display body 10 was irradiated with white light at an incident angle of 20 °, and the reflectance in the normal direction was measured. As a result, the reflectance was about 9%. Further, the display 10 was irradiated with white light at an incident angle of 40 °, and the diffraction efficiency at this time was measured. As a result, the first-order diffraction efficiency for light having a wavelength of 442 nm was about 11% at the maximum.

(Comparative example)
A display body was manufactured in the same manner as in the above example except that the relief structure forming layer was placed in a vacuum vapor deposition apparatus so that its main surface was horizontal and the reflective layer was formed with a thickness. The reflective layer of this display body did not include an opening and had a thickness of about 30 nm over the whole.

  When the display body 10 was observed from the normal direction, the display portion DP1 appeared black. However, even when the display body 10 is tilted and observed, almost no diffracted light from the display portion DP1 can be confirmed.

Next, this display body 10 was irradiated with white light at an incident angle of 20 °, and the reflectance in the normal direction was measured. As a result, the reflectance was about 8%. Further, the display 10 was irradiated with white light at an incident angle of 40 °, and the diffraction efficiency at this time was measured. As a result, the first-order diffraction efficiency for light having a wavelength of 442 nm was about 0.7%.
The invention described in the original claims is appended below.
[1] A relief structure forming layer in which a diffractive structure composed of a plurality of concave portions or convex portions arranged two-dimensionally at a pitch of 500 nm or less is provided on one main surface, and is made of a metal or an alloy and covers the diffractive structure Each of a plurality of regions corresponding to the plurality of concave portions or convex portions of the reflective layer, and a first portion having a thickness of 50 nm or more and a thickness as an opening or 10 nm. The display body characterized by including the 2nd part as the following parts.
[2] The display body according to item 1, wherein a relative position of the first portion with respect to the concave portion or the convex portion is equal to each other between the plurality of regions.
[3] The display body according to item 2, wherein only a part of each side wall of the plurality of concave portions or convex portions is covered with the first portion.
[4] The display body according to item 3, wherein a relative position of the second portion with respect to the concave portion or the convex portion is equal to each other between the plurality of regions.
[5] The reflective layer includes a first reflective part that covers a part of the diffractive structure, and a second reflective part that covers the other part of the diffractive structure, and the first and second reflective parts The relative position of the first portion with respect to the concave portion or convex portion is equal between the plurality of regions, and the first and second reflecting portions are relative to the concave portion or convex portion with respect to the first portion. Item 2. The display body according to item 1, wherein the positions are different from each other.
[6] The display body according to item 1 or 5, wherein the diffractive structure includes a plurality of diffractive structure parts different from each other in at least one of a shape, a pitch, and an arrangement direction of the concave part or the convex part.
[7] An article with a display body, comprising the display body according to any one of items 1 to 6 and an article that supports the display body.

The top view which shows schematically the display body which concerns on 1 aspect of this invention. The perspective view which expands and shows a part of display body shown in FIG. Sectional drawing along the III-III line of the display body shown in FIG. Sectional drawing which expands and shows a part of structure shown in FIG. The top view which shows roughly an example of the image which the display body shown in FIG. 1 thru | or FIG. 4 displays when it observes from a direction perpendicular | vertical to a display surface, illuminating with white light. The perspective view which shows roughly an example of the image which the display body shown in FIG. 1 thru | or FIG. 4 displays when it observes from the diagonally right front with respect to a display surface, illuminating with white light. The perspective view which shows roughly an example of the image which the display body shown in FIG. 1 thru | or FIG. 4 displays when it observes from the left diagonal front with respect to a display surface, illuminating with white light. The graph which shows the example of the influence which the thickness of a reflection layer has on the optical characteristic. The graph which shows the example of the influence which the thickness of a reflection layer has on the optical characteristic. The graph which shows the example of the influence which the thickness of a reflection layer has on the optical characteristic. The top view which shows roughly the display body which concerns on one modification. The top view which shows roughly the display body which concerns on another modification. The perspective view which shows roughly an example of the image which the display body shown in FIG. 12 displays when it observes from the diagonally right front with respect to a display surface, illuminating with white light. The perspective view which shows roughly an example of the image which the display body shown in FIG. 12 displays when it observes from the left diagonal front with respect to a display surface, illuminating with white light. The top view which shows an example of an article | item with a display body roughly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Display body, 20 ... Printed material main body, 100 ... Printed matter, 110 ... Relief structure formation layer, 110R ... Recessed part, 120 ... Reflective layer, 120a ... First part, 120b ... Second part, 210 ... Base material, 220 ... Printing Layer, DP1 ... display unit, DP1a ... display unit, DP1b ... display unit, DP2 ... display unit, DP3 ... display unit, VW1 ... observer, VW2 ... observer.

Claims (7)

A relief structure forming layer in which a diffractive structure composed of a plurality of concave portions or convex portions arranged two-dimensionally at a pitch of 500 nm or less is provided on one main surface; and a reflective layer made of a metal or an alloy and covering the diffractive structure; The reflective layer is formed by oblique vapor deposition or oblique sputtering, and each of the plurality of regions corresponding to the plurality of concave portions or convex portions of the reflective layer includes a first portion having a thickness of 50 nm or more. And a second part as an opening or a part having a thickness of 10 nm or less.   The display body according to claim 1, wherein a relative position of the first portion with respect to the concave portion or the convex portion is equal between the plurality of regions. The display body according to claim 2, wherein only a part of each side wall of the plurality of concave portions or convex portions is covered with the first portion.   The display body according to claim 3, wherein a relative position of the second portion with respect to the concave portion or the convex portion is equal among the plurality of regions.   The reflective layer includes a first reflective part covering a part of the diffractive structure, and a second reflective part covering the other part of the diffractive structure, and in each of the first and second reflective parts The relative position of the first portion with respect to the concave portion or the convex portion is equal to each other between the plurality of regions, and the first and second reflecting portions are the relative position of the first portion with respect to the concave portion or the convex portion. The display bodies according to claim 1, wherein are different from each other.   6. The display body according to claim 1, wherein the diffractive structure includes a plurality of diffractive structure parts different from each other in at least one of a shape, a pitch, and an arrangement direction of the concave part or the convex part.   An article with a display body comprising the display body according to any one of claims 1 to 6 and an article that supports the display body.

Images