JP2008134586A - Display element and display body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display element which is advantageous to prevention of forgery and has non-conventional visual effect, and a display body using the same. <P>SOLUTION: The display element 10 is constituted by including a fine uneven region 11 and a light absorption region 12 respectively provided in a different region. The fine uneven region 11 is formed from fine uneven parts. The light absorption region 12 has a function of absorbing visual light. The fine uneven region 11 is recognized as a black pattern in the observation from the normal direction of a pattern surface. When an observer continues the observation of the light absorption region 12 while changing the angle to the normal direction of the pattern surface, a color caused by a diffraction phenomenon of light is observed. In the light absorption region 12, a similar color is observed regardless of the observation angle of the observer. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a display element mainly for security, which has a fine uneven region and a light absorption region made of fine unevenness on the surface, and a display body using the same.

  Conventionally, as a means for preventing counterfeiting, a fine structure or color tone change that cannot be easily imitated, or an optical phenomenon that is only in combination with another optical functional film as a discriminator is observed. Various aspects have been put into practical use with the advancement of technology, such as a configuration in which a certain pattern or the like can be read only by a dedicated reader.

Among them, a hologram and a diffraction grating image are given as one of the most utilized because of practical ease of operation.
A hologram is produced by providing a fine concavo-convex pattern and a refractive index distribution by an optical photographing method such as two-beam interference. On the other hand, the diffraction grating image is produced using a pixel in which a diffraction grating is arranged in a minute area.
Both holograms and diffraction grating images are difficult to counterfeit, difficult to copy with color copiers, etc., and are excellent in design, so they are widely used for credit cards, ID cards, various securities, certificates, etc. ing.
However, in actual operation, the authenticity of holograms and diffraction grating images is left to the human eye, so even if it is a microscopically fake product, all people can accurately and accurately authenticate with the naked eye. It is not easy to make a false determination.

  On the other hand, for the reason that the authenticity can be easily determined visually and it is difficult to make a copy with a color copier, a laminate is mainly proposed by laminating a plurality of layers having different refractive indexes.

In this case, light of a specific wavelength is strongly reflected, and the wavelength changes depending on the reflection angle, so that a phenomenon that the color changes depending on the viewing angle (observation angle) can be observed. By observing the presence or absence of this color change, authenticity can be determined relatively easily, and of course copying by a color copier is impossible.
Japanese Patent No. 2797944 Japanese Patent No. 3139255 Patent No. 3329234 Japanese Patent No. 3395322 Japanese Patent No. 3409612 Japanese Patent No. 3345840 Japanese Patent No. 3470411 Japanese Patent No. 3480336 Japanese Patent No. 3536413

However, in actual operation, the authenticity of holograms and diffraction grating images is left to the human eye, so even if it is a microscopically fake product, all people can accurately and accurately authenticate with the naked eye. It is not easy to make a false determination. Also, a general diffraction grating structure can be formed with relatively easily available equipment, that is, it is relatively easy to forge or imitate.
The present invention has been made in consideration of the above technical background, and is advantageous in preventing counterfeiting, and provides a display element having an unprecedented visual effect and a display body using the same. With the goal.

  In order to achieve the above object, a display element according to claim 1 of the present invention extends on a plane, a fine uneven region having fine uneven portions, a light absorbing region having an absorption band in the visible light region, and a plane. A display element disposed on the pattern surface such that the fine uneven region and the light absorption region represent a predetermined pattern shape, and the cross-section is perpendicular to the pattern surface. The width of the fine irregularities has a width equal to or smaller than the wavelength of visible light, and the cross-sectional area of the convex portion forming the fine irregularities in the cross section parallel to the pattern surface extends from the proximal end to the distal end of the convex portion. It is formed so that it may decrease as it goes.

  The display element according to claim 2 of the present invention is characterized in that the width of the fine unevenness is a width at a location near the pattern surface of the convex portion in a cross section perpendicular to the pattern surface.

According to a third aspect of the present invention, there is provided a display device comprising: a fine uneven region having fine unevenness; a light absorption region having an absorption band in a visible light region; and a pattern surface extending on a plane. The display device is arranged on the pattern surface so that the uneven region and the light absorption region represent a predetermined pattern shape, and the fine unevenness includes a plurality of fine protrusions or recesses regularly arranged. The distance between the centers of the protrusions or recesses in the cross section perpendicular to the pattern surface is equal to or less than the wavelength of visible light, and the protrusions forming the fine unevenness are parallel to the pattern surface. The cross-sectional area in the cross section is formed so as to decrease from the base end to the tip end of the convex portion.
The display element according to claim 4 of the present invention is characterized in that the fine uneven region and the light absorption region have substantially the same reflectance.

  Moreover, the display element which concerns on Claim 5 of this invention is characterized by the said light absorption area | region exhibiting black by light absorption.

  The display element according to claim 6 of the present invention is characterized in that, in addition to the fine uneven region and the light absorption region, a diffraction grating region including a diffraction grating formed by unevenness is disposed on the pattern surface. And

  A display according to a seventh aspect of the present invention is characterized in that the display element according to any one of the first to sixth aspects is arranged on a substrate.

  The display element according to claim 8 of the present invention is a substrate on which a fine uneven region having fine unevenness, a light absorption region having an absorption band in a visible light region, and a pattern surface extending on a plane are formed. The fine uneven region and the light absorption region are arranged on the pattern surface so as to represent a predetermined pattern shape.

  According to the display element and the display body according to the present invention, since the fine uneven region is composed of extremely minute unevenness, it is very difficult to analyze the unevenness to produce the same unevenness, so that strong anti-counterfeiting and imitation prevention The effect is obtained, and an inherent color change can be partially obtained in the fine uneven region depending on the observation angle of the observer, which is advantageous in obtaining an unprecedented visual effect.

Hereinafter, the present invention will be specifically described with reference to the drawings.
FIG. 1 schematically shows a part of a cross section of a display element according to the present invention.
The display element 10 is arranged on the pattern surface such that the fine uneven region 11, the light absorption region 12, and the pattern surface (pattern formation surface) extending on the plane represent a predetermined pattern shape. The display element 10 includes a first base material 15 on the observer side and a second base material 16 on the back side.
The fine uneven region 11 is formed of the fine uneven portion 13 and the reflective layer 14.
That is, the fine unevenness region 11 has a fine unevenness 13 having a width equal to or less than the wavelength of visible light in the cross section as shown in the figure, and the cross-sectional area of the convex portion decreasing toward the tip portion. In spite of having the reflective layer 14 to be coated and having the reflective layer 14, the reflectance reduction effect for visible light can be obtained only by the concavo-convex structure. Examples of the fine irregularities 13 include the structure shown in FIG.
More specifically, the width of the fine irregularities 13 in the cross section perpendicular to the pattern surface has a width equal to or smaller than the wavelength of visible light, and the convex portions forming the fine irregularities 13 are parallel to the pattern surface. The cross-sectional area in a simple cross section is formed so as to decrease from the base end to the tip end of the convex portion. In this example, as shown in FIG. 1, the width of the fine unevenness 13 is a width w <b> 1 at a location near the pattern surface of the convex portion in a cross section perpendicular to the pattern surface. More preferably, the center-to-center distance w2 of the concave portion or the convex portion is set to be equal to or less than the wavelength of visible light. In FIG. 1, the upper side of the observer side is shown with the center of the cross section of the base end portion as a reference when the top end portion of the convex portion forming fine unevenness is viewed and the lower side of FIG. 1 is the base end portion of the convex portion. ing. The fine irregularities 13 and the reflective layer 15 are located at the interface between the first base material 15 and the second base material 16.
The light absorption region 12 has a function of absorbing visible light.

FIG. 2 shows an example of a display element according to the present invention in which the fine uneven region 11 and the light absorption region 12 are formed in a fixed pattern.
For the reason described above, when the fine uneven region 11 is observed from the vicinity of the normal direction of the pattern surface (hereinafter referred to as frontal observation), it is recognized as a black pattern as shown in FIG.
Further, as shown in FIG. 2B, when an observer observes while observing an angle with respect to the normal line of the pattern surface (hereinafter referred to as oblique observation), the fine uneven region 11 exhibits a light diffraction phenomenon. The resulting color is observed.
On the other hand, the light absorption region 12 exhibits almost the same color regardless of the observation angle of the observer.

That is, as shown in FIG. 2, the fine uneven region 11 and the light absorption region 12 are arranged in a certain pattern on a plane, whereby only the fine uneven region 11 exhibits a unique color change depending on the observation angle. Can be obtained.
In other words, by arranging the fine uneven region 11 and the light absorption region 12 so that a predetermined pattern shape is displayed on the pattern surface, only the fine uneven region 11 displays a unique color change depending on the observation angle. The element 20 can be obtained.

  Here, the fine unevenness 13 forming the fine unevenness region 11 does not necessarily have the same size and shape, and the cross-sectional shape also shows the above-described effect of reducing the reflectance with respect to visible light. If there is, it will not be specifically limited.

Typically, the distance between the center of a certain convex part and the center of the convex part closest to this (inter-center distance) is preferably not more than the visible light wavelength, not more than 400 nm, more preferably not more than 350 nm. . If it is below this wavelength, the diffracted light in the long wavelength region (for example, red to yellow) of the diffracted light of the visible light is theoretically emitted below the plane of the display element, and in the short wavelength region (for example, purple to green). Only the diffracted light can be emitted above the plane. Therefore, it is possible to observe diffracted light in a narrow wavelength range by observing from an angle that is inclined more than the viewing angle of a normal hologram or diffraction grating image and parallel to the plane formed by the display element.
In addition, the emission angle range of diffracted light in a certain wavelength region (for example, a green region having a wavelength of 520 to 570 nm) with respect to a certain incident light angle on the fine uneven region 11 included in the display element of the present invention is theoretically normal. Therefore, it is possible to observe diffracted light close to a single color tone.
The center distance is preferably 200 nm or more. If it is smaller than this range, all of the diffracted light in the visible region has an emission angle of 90 degrees or more below the plane of the display element, and the diffracted light cannot be confirmed visually with the naked eye. In order to confirm well with the naked eye, it is preferably larger than 250 nm. In the case of machine reading, since a light beam having a wavelength below the visible region can be confirmed within a range that can be detected by a light receiving element such as a CCD, the distance between the centers can be set small according to the purpose.
The height of the convex portion (depth of the concave portion) may be not less than ½ of the center-to-center distance, and is typically not less than 0.3 μm and not more than 0.5 μm.
The shape of the convex portion that can be selected as the fine irregularities 13 includes a cone, a pyramid, and a dome shape including a hemisphere, such as a shape in which the cross-sectional area decreases continuously or stepwise from the base end to the tip. If it is. The effect of the present invention can be obtained even if the tip of the convex portion is not sharp. The shape of the convex portion is preferably a cone since the horizontal sectional area continuously changes.
The arrangement of the convex portions may be regular. For example, they may be arranged in a matrix, and it is particularly preferable to select an arrangement method that can be arranged most densely in accordance with the cross-sectional shape in the horizontal direction of the protrusion base end. In particular, it is preferable that the base end portion of the convex portion is formed in contact with the adjacent convex portion without leaving an interval. Here, even if the regularity is partially broken, it is possible to obtain the action of the display body of the present invention that suppresses regular reflection to some extent and emits diffracted light.
When the fine unevenness 13 is a set of a plurality of convex portions as shown in FIG. 6, the display element is configured such that the base end side is an observer side and a hole is formed from the observer side. It is preferable because deformation and breakage of the tip of the convex portion can be prevented.

  The first base material 15 and / or the second base material 16 are layers for holding the fine uneven structure constituting the fine uneven region 11. Examples of the material of the first base material 15 and the second base material 16 may include thermoplastic or photocurable resins. For example, when a thermoplastic resin or a photocurable resin is used, the first base material 15 or the second base material 16 provided with a concave structure and / or a convex structure on one main surface can be easily transferred by transfer using an original plate. Can be formed. The first base material 15 and the second base material 16 may use the same material. By using a light-transmitting material, it can be observed as a display element through each base material. Each of the first base material 15 and the second base material 16 may be a laminate of a plurality of types of resins. Further, one of the first base material 15 and the second base material 16 can be omitted. Or in order to arrange | position the display element of this invention to another base material, and to use as a display body, any one can also be made into an adhesive layer.

The fine irregularities 13 can be formed by, for example, a method of drawing a pattern with an electron beam on a photosensitive resin material. Alternatively, it is formed by the so-called hot embossing method in which a master plate with fine irregularities corresponding to fine irregularities is pressed against a thermoplastic resin laminated on a film, for example, as in the production of a surface relief hologram can do.
It is also possible to apply a UV curable resin to a transparent substrate such as a film, press the original plate against it, and then irradiate ultraviolet rays from the substrate side to cure the UV curable resin and then remove the original plate. The 1st base material 15 or the 2nd base material 16 provided with the unevenness | corrugation 13 can be obtained. At this time, a diffraction grating structure described later can be formed together.
An original plate with fine irregularities can be obtained, for example, by a method in which a resin in which a hologram pattern is recorded using a two-beam interference method, a resin in which a pattern is drawn by an electron beam is used as a matrix, or a metal is cut by a cutting tool. It can be obtained by electroforming the mother die obtained.

As the reflective layer 14, for example, a metal film made of a metal material such as aluminum, silver, or an alloy thereof can be used. In this case, when the fine uneven region 11 is observed from the normal direction, it looks black or gray achromatic. Alternatively, a dielectric layer made of, for example, ZnO having a refractive index different from that of the first base material 15 and the second base material 16 may be used as the reflective layer 14. In this case, for example, when the fine concavo-convex region 11 is observed from the normal direction on the first base material 15 side, the color of the lower layer of the reflective layer, that is, the second base material 16 or the color below it can be confirmed. it can. Any of the reflective layers can be formed by a thin film forming method such as vapor deposition or sputtering. The reflective layer 14 may be on the observer side or the back surface side with respect to the fine irregularities 13 as long as it follows the shape of the fine irregularities 13.
Alternatively, in addition to the reflective layer 14, a laminate of dielectric layers having different refractive indexes between adjacent ones, that is, a dielectric multilayer film may be provided. However, the refractive index of the dielectric layer included in the dielectric multilayer film that is in contact with the first base material 15 needs to be different from the refractive index of the first base material 15. If a multilayer dielectric film is used, wavelength selectivity can be imparted to the fine concavo-convex region 11, so that a visual effect different from that when a metal or single-layer dielectric film is used as a reflective layer can be obtained.
The multilayer dielectric film is obtained, for example, by alternately depositing a high refractive index material such as zinc sulfide and a low refractive index material such as magnesium fluoride on the first base material 15 on which the fine irregularities 13 are formed. .

  The display element of the present invention is manufactured, for example, by providing the first base material 15 with the fine unevenness 13, forming the reflective layer 14 covering the fine unevenness 13, and forming the second base material 16 thereon. Can do. For example, a laminated body in which an embossed layer having a thickness of 1 μm is provided on a light-transmitting film having a thickness of 100 μm as the first base material 15 is provided with fine irregularities 13 on the embossed layer, and a reflective layer having a thickness of 100 nm is provided by aluminum vapor deposition. Thereafter, the second substrate 16 can be obtained by bonding a resin film on the reflective layer via an adhesive. If the second substrate is a laminate of an adhesive material and release paper, the display element of the present invention can be used as a seal.

As an embodiment that brings about a peculiar effect, in the front observation, the fine uneven region 11 and the light absorption region 12 have substantially the same reflectance.
In the fine uneven region 11, depending on the shape of the fine uneven portion 13 constituting the fine uneven region 11, in frontal observation, when the reflective layer is a metal film, it exhibits gray to black, and when the reflective layer is a dielectric layer, Visible light is transmitted to exhibit the color of the lower layer of the reflective layer, but if the light absorption region 12 corresponding to the color is disposed, the fine uneven region 11 and the light absorption region 12 have substantially the same appearance in frontal observation.

Among them, an embodiment that brings about a remarkable effect is a configuration in which the reflective layer 14 provided in the fine uneven region 11 is a metal film, and the light absorption region 12 exhibits a black color due to light absorption.
For example, a layer containing a black dye or pigment in the light absorption region 12 is provided as a light absorption layer 17 on the surface or the interface between the first base material 15 and the second base material 16, or an inorganic oxide that absorbs visible light. Alternatively, this is achieved by providing a layer made of a metal oxide as the light absorbing layer 17 on the surface or the interface between the first base material 15 and the second base material 16. The light absorption layer 17 can be formed with a thickness of about 1 to 10 μm, for example, by printing.
FIG. 3 shows an example of an embodiment of the display element 30 according to the present invention in which a light absorbing region 12 exhibiting black and a fine uneven region 11 having substantially the same light reflectance in the light absorbing region are formed in a pattern. Indicated.
In this case, in the front observation, it is difficult to distinguish between the fine uneven region 11 and the light absorption region 12 and it is difficult to recognize the pattern shape. While the color due to the diffraction phenomenon is observed, the light absorption region 12 exhibits a black color substantially equal to that at the front observation, so that the pattern can be recognized.
That is, in particular, in the display element 30 as illustrated in FIG. 3, in addition to a part of the pattern showing a specific color change depending on the observation angle, a visible and invisible two-state change of the pattern is possible.

Further, in the front observation, which is an embodiment that brings about a peculiar effect, the reflective layer 14 included in the fine uneven region 11 is transparent as another configuration in which the fine uneven region 11 and the light absorption region 12 have substantially the same reflectance. A configuration in which a dielectric layer is used and the lower layer of the reflective layer has an absorption band in the visible light region substantially equal to the light absorption region 12 can be given. For example, a light absorption layer equal to the light absorption layer 17 provided in the light absorption region 12 can be provided at any position below the reflection layer provided in the fine uneven region. With this configuration, the fine uneven region 11 and the light absorption region 12 have substantially the same appearance in frontal observation.
On the other hand, in the oblique observation, the color due to the light diffraction phenomenon is observed in the fine concavo-convex region 11, while the light absorption layer 12 exhibits the same color of the light absorption layer as that in the front observation. Be able to recognize.

FIG. 4 shows an example of an embodiment of the display element 40 according to the present invention in which a diffraction grating region 41 is added to the display element.
The diffraction grating constituting the diffraction grating region 41 is provided with a reflective layer in an assembly in which linear or curved convex portions or concave portions are arranged in parallel at intervals of about the wavelength of visible light or more. When white light is used as incident light, the first-order diffracted light appears mainly at different angles for each wavelength.
In the diffraction grating region 41, a desired color image can be obtained by appropriately setting the spatial frequency, the azimuth angle, the diffraction efficiency, the depth or the height of the diffraction grating to be configured for each minute area in the region. Can do. In addition, by appropriately setting the material and configuration of the reflective layer, desired visual effects such as wavelength selectivity and visibility / invisibility of the lower layer can be obtained.

Here, a difference in response to incident light between the diffraction grating region 41 and the fine uneven region 11 according to the present invention will be briefly described.
As described above, the diffraction grating region 41 is made of a diffraction grating formed at intervals of about the wavelength of visible light or more, and the fine uneven region 11 is made of a fine uneven structure having a wavelength less than the wavelength of visible light. The diffraction angles of the diffracted light (mainly first-order diffracted light) with respect to the light are different.
That is, when an observer observes the display element 40 in which the diffraction grating region 41 and the fine unevenness region 11 are formed on substantially the same plane, the diffraction grating has a relatively small angle range with respect to the normal line of the plane. Diffracted light from the region 41 is observed, and diffracted light from the fine uneven region 11 is observed in a larger angle range.
Further, since the diffracted light from the diffraction grating region 41 has a wider angle range in which each wavelength band appears than the diffracted light from the fine concavo-convex region 11, the fine concavo-convex region 11 is rainbow-colored when observed from a certain angle. Instead, a color closer to a single color is obtained.
Therefore, for example, in the display element 40 of FIG. 4, two types of images, that is, a grating image with a black background (image by a diffraction grating) and an image formed by the light absorption region 12 are observed during frontal observation. Here, the black background is the fine uneven region 11. Of course, when the light absorption region 12 is configured to be black, the fine uneven region 11 and the light absorption region 12 are almost equally perceived by human eyes, and only the grating image is observed. .
On the other hand, during oblique observation, a color mainly due to light diffraction in the fine uneven region 11 is observed.
That is, in the display element according to the present invention as illustrated in FIG. 4, three kinds of unique color changes that differ depending on the observation angle can be realized simultaneously in the same plane.

FIG. 5 shows an example in which the display element according to the present invention described above is arranged on a substrate such as a card or paper.
This example is an example of an embodiment of the display body 50 in which the display element according to the present invention is practically used.
The substrate 51 is not particularly limited and can be applied to any solid as long as it can be arranged.
In obtaining the display according to the present invention, substantially the same effect can be obtained by forming the light absorption region according to the present invention on a substrate such as a card or paper.
In this case, the display element is formed by arranging only the fine uneven area 11 or the fine uneven area 11 and the diffraction grating area 41 leaving a blank area, and the display element is formed on the base on which the light absorption area 12 is formed. What is necessary is just to make it the said blank area | region and the light absorption area | region 12 overlap, when arrange | positioning on a material.
Depending on the pattern of the display body according to the present invention, the cost can be reduced by forming the light absorption region 12 on the substrate in advance by printing, for example.

As described above, when the fine uneven region of the present invention is observed from the front, the reflection of incident light is reduced to exhibit black, but when the observer observes the display element surface at an increased angle from the front. The color due to the light diffraction phenomenon is observed.
On the other hand, the light absorption region exhibits substantially the same color regardless of the observation angle of the observer with respect to the display element surface.
That is, the display element of the present invention can obtain a partial color change depending on the viewing angle of the observer, and is advantageous in obtaining a visual effect that is different from the security devices represented by conventional holograms. Become.
In addition, the fine concavo-convex region is composed of extremely fine concavo-convex portions, and it is very difficult to analyze the concavo-convex portions to produce similar concavo-convex portions, which is advantageous in obtaining a strong anti-counterfeit / counterfeit effect. .
Among them, a peculiar form is that the light absorption region of the present invention is configured to exhibit a black color. In this case, the pattern is concealed in the front observation, and in the oblique observation, the pattern is changed by the color change (colored) of only the fine uneven region. You can get an unprecedented visual effect.
Furthermore, by adding a diffraction grating region to the above-described fine uneven region and light absorption region, the effect of the conventional hologram is added, which is advantageous in obtaining more various visual effects.
In addition, by arranging the display element of the present invention on a substrate such as a card or paper, a counterfeit / counterfeit display body having a high anti-counterfeiting effect and a visual effect as described above is practically provided. Is something that can be done.

  Since the present invention has an unprecedented visual effect and is difficult to counterfeit, in addition to security applications such as anti-counterfeiting, certification, etc., it can be combined with printed materials such as game cards, postcards, product packaging, books, etc. Can also be used.

It is the figure which showed a part of cross section of the display element which concerns on this invention roughly. It is the figure which showed one form of the display element which concerns on this invention roughly. It is the figure which showed one form of the display element which concerns on this invention roughly. It is the figure which showed one form of the display element which concerns on this invention roughly. It is the figure which showed one form of the display body which concerns on this invention roughly. It is the figure which showed roughly an example of the uneven structure with which the display element which concerns on this invention is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 20, 30, 40 ... Display element, 11 ... Fine uneven | corrugated area | region, 12 ... Light absorption area | region, 13 ... Fine uneven | corrugated, 14 ... Reflective layer, 15 ... 1st base material, 16 ... 2nd base material, 17 ... Light Absorbing layer, 41 ... diffraction grating region, 50 ... display body, 51 ... base material.

Claims (8)

A fine uneven region with fine unevenness, and
A light absorption region having an absorption band in the visible light region;
A pattern surface extending on a plane,
The display device is disposed on the pattern surface so that the fine uneven region and the light absorption region represent a predetermined pattern shape,
The width of the fine irregularities in a cross section perpendicular to the pattern surface has a width equal to or smaller than the wavelength of visible light,
And it is formed so that the cross-sectional area in the cross section parallel to the pattern surface of the convex portion forming the fine unevenness decreases from the base end to the tip end of the convex portion,
A display element characterized by the above. The width of the fine unevenness is a width at a location near the pattern surface of the convex portion in a cross section perpendicular to the pattern surface.
The display element according to claim 1. A fine uneven region with fine unevenness, and
A light absorption region having an absorption band in the visible light region;
A pattern surface extending on a plane,
The display device is disposed on the pattern surface so that the fine uneven region and the light absorption region represent a predetermined pattern shape,
The fine irregularities are configured by regularly arranging a plurality of fine convex portions or concave portions,
The center-to-center distance of the convex part or the concave part in a cross section perpendicular to the pattern surface is not more than the wavelength of visible light,
And it is formed so that the cross-sectional area in the cross section parallel to the pattern surface of the convex portion forming the fine unevenness decreases from the base end to the tip end of the convex portion,
A display element characterized by the above.   4. The display element according to claim 1, wherein the fine uneven region and the light absorption region have substantially the same reflectance.   The display element according to claim 1, wherein the light absorption region exhibits a black color due to light absorption.   6. The diffraction grating area having a diffraction grating constituted by irregularities in addition to the fine irregularity area and the light absorption area is disposed on the pattern surface. Display element.   A display body comprising the display element according to claim 1 disposed on a base material. A fine uneven region with fine unevenness, and
A light absorption region having an absorption band in the visible light region;
A substrate on which a pattern surface extending on a plane is formed,
The fine uneven region and the light absorption region are arranged on the pattern surface so as to represent a predetermined pattern shape,
A display body characterized by that.

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