JP2020008666A - Display device - Google Patents

Abstract

To provide a display device that exerts a non-conventional visual effect with no need for a cumbersome manufacturing process, and to achieve a more advanced fake prevention effect.SOLUTION: A display device has, on a surface,: a relief structure formation layer that has an unevenness structure; and a reflection layer. The unevenness structure is composed of a plurality of arrayed cells, and at least one part of the plurality of cells is a cell A group that has at least the unevenness structure serving as a part of the unevenness structure of a Fresnel lens-like concentric circle pattern. The cell A group includes two or more cells A1 of one group that each at least carrying the unevenness structure in which the unevenness structure of the single concentric circle pattern provided like a Fresnel lens is divided into the arbitrary number of sub-unevenness structures in each cell. In the cell A1 of the one group, in accordance with an orientation direction and pitch of the unevenness structure each cell has, each cell is re-arranged on a coordinate that serves as a coordinate axis where the orientation direction and the pitch are orthogonal.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a structure based on optical technology that provides anti-counterfeiting, decorative or aesthetic effects.

In fields such as securities, certificates, branded products, dedicated consumables or replacement parts for electronic devices and various machines, and personal authentication media, it is desired that counterfeiting or falsification is difficult.
Therefore, in such a field, an optical structure having an excellent forgery prevention effect may be supported.

  Many optical structures include microstructures such as diffraction gratings, holograms and scattering structures or lens arrays. These microstructures cause, for example, a change in color or visual image in response to a change in the viewing angle.

  In addition, it is difficult to analyze these fine structures, and forgery is also difficult because manufacturing requires expensive equipment such as an electron beam lithography apparatus. Therefore, these optical structures can exhibit an excellent anti-counterfeiting effect.

  As a technique relating to such a structure, for example, Patent Literature 1 proposes a technique in which a pixel is divided into three as RGB channels, and a color image of photographic quality is expressed by a diffraction structure by the area gradation inside the channel. .

  However, hologram fabrication technology has become widespread at present, and even if holographic images with photographic quality alone cannot produce exactly the same thing, there is a possibility that a fake that can give a similar impression at first glance may be created For this reason, the forgery prevention effect is becoming smaller.

  Patent Document 2 proposes that a more complicated optical effect is generated by providing two layers of an optically variable effect generating structure such as a hologram.

  However, such a method complicates the manufacturing process and increases the manufacturing cost.

JP-A-8-218821 JP-A-2005-135519

  In view of the above problems, the main focus of the present invention is to provide a display device that can always be used in the field of forgery prevention where a new function is required, without requiring a complicated manufacturing process and while being relatively inexpensive. It is another object of the present invention to provide a display device capable of exhibiting an unprecedented visual effect and realize a higher forgery prevention effect.

The present invention has been made to solve these problems.
That is, the invention according to claim 1, a display device having a relief structure forming layer having an uneven structure on the surface and a reflective layer formed so as to cover at least a part of the surface on which the uneven structure is formed. Wherein the uneven structure is composed of a plurality of cells arranged, and at least a part of the plurality of cells has at least an uneven structure that is a part of the uneven structure of a Fresnel lens-shaped concentric pattern. Group A, wherein the group of cells A is composed of two or more groups of cells A1. The group of cells A1 is obtained by dividing the concavo-convex structure of the concentric pattern provided in the single Fresnel lens shape into an arbitrary number. The uneven structure is carried at least in each cell, and in the group of cells A1, according to the orientation direction of the uneven structure of each cell and the pitch of the uneven structure, A display device, characterized in that the pitch and has rearranged each cell on a coordinate serving as coordinate axes perpendicular to the.

  In the invention according to claim 2, when the display device is irradiated with light from a specific direction using a light source, diffracted light is emitted by the concave-convex structure provided in each cell of the cell A group. The display device according to claim 1, wherein an arbitrary image including a plurality of high-luminance image points is visually recognized by the diffracted light.

  According to a third aspect of the present invention, when the position of the light source that irradiates the display device with light is moved in an arbitrary direction with respect to the display device, the position of the reproduced image is changed by the movement of the light source. 3. The display device according to claim 1, wherein the display device moves in a direction orthogonal to the set direction.

The invention according to claim 4, wherein the plurality of cells further includes a cell B group,
4. The display device according to claim 1, wherein the group of cells B has an arbitrary uneven structure including a flat surface, different from the uneven structure carried by the group of cells A. 5. is there.

  According to the first invention, the appearance of a high-brightness image point observed from the positional relationship between the illumination applied to the display device and the observer is different from the conventional one by changing the position of the illumination or the like. It can provide various visual effects.

  According to the second and third aspects of the present invention, the entire image formed by the high-luminance image points changes the position of illumination or the like, thereby giving an unprecedented movement and providing a new visual effect. .

  According to the fourth aspect of the invention, by combining a portion having a new visual effect born from a structure obtained by rearranging the concavo-convex pattern of the concentric pattern provided in a Fresnel lens shape and an image such as a hologram, higher decorativeness and Thus, the forgery prevention effect can be improved.

It is a top view which shows the example of the uneven structure of a Fresnel lens shape. FIG. 2 is a cross-sectional view illustrating an example of an A-A ′ section of FIG. 1. It is a top view showing the example of one group of cells A1 before rearrangement. It is a top view showing the example of one group of cells A1 which rearranged each cell. It is a conceptual diagram of the cell A group by one group of cells A1 after several rearrangement. It is an example of the cell in the overlap part of one group of cells A1 after a plurality of rearrangements. It is a conceptual diagram which shows the observation method of a display device. FIG. 7 is a conceptual diagram illustrating an example of moving a reproduced image when the position of a light source is moved in a horizontal direction. FIG. 7 is a conceptual diagram illustrating an example of moving a reproduced image when the position of a light source is moved in a vertical direction. It is sectional drawing which shows the example of a structure at the time of using a display device as a transfer foil. It is a top view showing the example of the article provided with the display device. FIG. 4 is a conceptual diagram illustrating an example of an image forming method of a conventional Fresnel lens structure device. FIG. 11 is a conceptual diagram showing an example of moving a Fresnel lens device reproduced image when a light source is moved laterally with respect to a conventional Fresnel lens structure device. FIG. 9 is a conceptual diagram showing an example of moving a reproduced image of a Fresnel lens device when a light source is moved in a vertical direction with respect to a conventional Fresnel lens structure device.

  Hereinafter, embodiments of the present invention will be described in detail. In the following description, reference is made to the drawings as appropriate, but the embodiments described in the drawings are exemplifications of the present invention, and the present invention is not limited to the embodiments described in these drawings.

  FIG. 1 is a plan view showing an example of a concavo-convex structure of a concentric pattern provided in a Fresnel lens shape in the present invention, and FIG. 2 is a cross-sectional view showing an example of an A-A ′ section in FIG.

  The concavo-convex pattern of the concentric pattern provided in the Fresnel shape is provided with the pitch of each concentric circle changed from the center of the concentric circle toward the outer edge thereof.

  FIG. 2 shows an example of a cross-sectional structure of a concavo-convex structure (10) having a concentric circular pattern provided in a Fresnel lens shape, in which a relief structure forming layer (12) is provided on a base material (11). An uneven structure is provided on the surface of (12), and a reflective layer (13) is provided on the surface provided with the uneven structure.

  The base material (11) does not necessarily need to be provided, and may be composed of only the relief structure forming layer (12) and the reflective layer (13), or may be further provided on the reflective layer (13). A protective layer, an intermediate layer, an adhesive layer, or the like may be provided. Detailed description of the materials of these layers will be described later.

  Here, the cross-sectional shape of the concavo-convex structure provided on the surface of the relief structure forming layer (12) may be a blazed shape, but is not necessarily limited to such a shape. , A polygon, a sine curve, a bowl, a spindle, a semicircle, or any other shape.

(Creation method and effect of uneven structure for display device)
The method for producing the uneven structure for a display device of the present invention and the effect thereof will be described with reference to FIGS.

  FIG. 3 is a plan view showing a group of cells A1 (10 ') before rearrangement arranged in a Fresnel lens shape.

  A group of cells A1 (10 ') before rearrangement is divided into an arbitrary number of cells (CE), and each cell (CE) is a part of a concavo-convex pattern of a concentric pattern provided in a Fresnel lens shape. Respectively.

  Here, FIG. 3 shows a boundary line of each cell (CE), but such a boundary line does not actually exist, and there is only an area divided as each cell (CE). .

  In the group of cells A1 (10 ′) before the rearrangement, the pitch of each concentric pattern-shaped uneven structure gradually changes from the center of the circle to the outer edge, that is, along the pitch transition direction (15). The orientation direction of the uneven structure is gradually changed along the circumference, that is, along the transition direction (16) of the orientation direction.

  Therefore, when observing an arbitrary cell (CE1, CE2, CE3) in FIG. 3, the pitch and the orientation direction of the concavo-convex structure provided in each cell are different from each other.

  With respect to the group of cells A1 (10 ') before such rearrangement, in the display device of the present invention, the orientation direction and the pitch are assumed to be coordinates that are orthogonal coordinate axes. Is rearranged.

  FIG. 4 shows an example of a group of cells A1 (20) after rearrangement, where the horizontal axis is the transition direction (15) of the pitch and the vertical axis is the transition direction (16) of the alignment direction.

  Here, the concavo-convex structure carried in each cell (CE) may be provided in a curved shape as shown in FIG. 3, however, it is sufficient for the circumference of the concentric circle before rearrangement. When the cells are divided into smaller cells (CE), they may be provided substantially in a straight line.

  By rearranging the cells as shown in FIG. 4, the present inventors cannot exert the light condensing effect provided by the device having the Fresnel lens structure, but have high brightness due to light diffraction. It has been found that it is possible to observe an image point and to generate an optical effect different from the image expression using a conventional Fresnel lens structure.

  That is, when the conventional Fresnel lens structure is applied, as in the case of the Fresnel lens structure device (80) shown in FIG. 12, depending on the arrangement status of each Fresnel lens structure (10a, 10b, 10c), A focal point (81) is observed, which forms an image of the Fresnel lens structure device (80).

  At this time, since the Fresnel lens structure device (80) uses a lens structure as an elemental technology, the relationship between the light source and the obtained image is limited to a point-symmetric relationship with respect to the lens center due to the characteristics of the lens. It will be.

  FIGS. 13 and 14 show how the Fresnel lens device reproduced image (82) moves when the position of the light source (41) that irradiates light to the Fresnel lens structure device (80) is changed.

  FIG. 13 shows an example in which the moving direction (411) of the light source moves in the left-right direction with respect to the Fresnel lens device (80), and the moving direction (821) of the Fresnel lens device reproduced image is It is recognized as a movement in the same horizontal direction.

  Similarly, FIG. 14 shows an example in which the movement direction (412) of the light source moves vertically with respect to the Fresnel lens structure device (80), and the movement direction (822) of the reproduced image of the Fresnel lens device. ) Is recognized as the same vertical movement.

  On the other hand, in the display device of the present invention, as described above, the uneven structure of the Fresnel lens-like pattern is constituted by a group of cells A1 (20) rearranged as shown in FIG. The cell A group (30) is configured by arranging a plurality of group cells A1 (20) as shown in FIG.

  As a result, although the light condensing effect as in the Fresnel lens structure device (80) cannot be exhibited, the reproduction of high-luminance image points is performed by the diffracted light due to the uneven structure provided in each cell (CE). It has been found that an image can be observed, and that an optical effect different from the image expression using a conventional Fresnel lens structure is generated.

  Here, it is not necessary to rearrange the entire lattice component of the Fresnel lens in the group of cells A1 (20), and the rearrangement may be performed within a pitch range and an orientation angle range suitable for observation.

  In the first group cell A1 (20) in which the respective cells are rearranged as described above, a plurality of groups of cells A1 (20a, 20b, 20c) are arranged as shown in FIG. The cell A1 is arranged so as to be a picture such as a number, a character, a symbol, or a pattern to be expressed.

  This makes it possible to express an arbitrary pattern including numbers, characters, symbols, patterns, and the like by a plurality of high-luminance image points each of which is a set of cells A1 (for example, 20a, 20b, and 20c) in each group. Become.

  At this time, the plurality of groups of cells A1 arranged in the group of cells A (30) form an overlapping portion (31) as shown in FIG.

  As shown in FIG. 6, such overlapping portions (31) are provided so that each cell (CE20a, CE20b, CE20c) in each group of cells A1 (20a, 20b, 20c) does not overlap. The cell A1 may be thinned out and combined, or multiple synthesis may be performed as long as the lattice shape of the concavo-convex structure provided in the cell is not inferior.

  The size of each cell is preferably about 10 μm to 100 μm on one side, but is not necessarily limited to this.

  As shown in FIG. 7, the display device (40) as described above is irradiated with light from a light source (41) and observed by an observer (42). According to the arrangement method, an arbitrary pattern composed of a plurality of high-luminance image points can be observed.

  The picture obtained in this way is represented as a picture that can be moved in accordance with the movement of the light source (41).

  That is, when the position of the observer (42) and the position of the display device (40) are fixed, by moving the position of the light source (41), a cell that emits observable diffracted light is transferred to another cell. And it can be observed as the movement of the high luminance image point.

  For example, when the light source (41) is moved left and right, the high luminance image point moves up and down, and when the light source (41) is moved up and down, the high luminance image point moves right and left.

  At this time, when observing while moving the light source (41) by smoothly changing the pitch and the angle of the orientation direction of the concavo-convex structure provided in each cell (CE) in the group of cells A1 (20). However, the movement of the high-luminance image point can be made a smooth movement without discomfort.

  8 and 9 show the optical effect of the display device (40) as described above, that is, the relationship between the moving direction of the light source (41) and the moving direction of the reproduced image (50).

  The display device (40) is irradiated with light from a specific direction using the light source (41), and when the observer (42) observes the image, a pattern formed by high-luminance image points composed of + 1st-order diffracted light; Two images of the picture formed by the high-intensity image points composed of the -1st-order diffracted light are observed. Here, paying attention to the reproduced image (50) formed by the high-intensity image points composed of the + 1st-order diffracted light. , The direction of the movement.

  FIG. 8 shows a case where the moving direction (411) of the light source is left and right. In this case, the moving direction (51) of the reproduced image is observed to move up and down.

  Similarly, FIG. 9 shows a case where the moving direction (412) of the light source is up and down. In this case, the moving direction (52) of the reproduced image is observed to move in the left and right direction.

  That is, when the reproduced image (50) is observed to move with the movement of the light source (41), the moving direction (411, 412) of the light source and the moving direction (51, 52) of the reproduced image are different. , Orthogonal directions, that is, 90 degrees.

  This is because, in the case of the Fresnel lens structure device (80) as shown in FIGS. 13 and 14, the moving directions (411, 412) of the light source and the moving directions (821, 822) of the reproduced image of the Fresnel lens device are: To be in the same direction is to provide a clearly different visual effect, and it is possible to provide an effective means even in the case of performing authenticity judgment or the like.

  As described above, the cross-sectional shape of the concavo-convex structure provided in the cell (CE) includes a blazed shape, a triangular shape, a rectangular shape, a polygonal shape, a sine curve shape, a bowl shape, a spindle shape, and a half shape. It may be provided in an arbitrary shape such as a circular shape. In particular, in the case of a blazed shape, a difference can be provided between the + order and − order diffracted light intensities of the diffracted light. Only folded light can be emitted, and the range of expression by diffracted light can be expanded.

  Therefore, a method of providing a concavo-convex structure having a different cross-sectional shape for each group of cells A1 according to the picture pattern desired to be expressed as the reproduced image (50) may be used.

  In the display device (40) having the cell A group (30), a plurality of cell A groups may be juxtaposed, and the cell B may be located adjacent to or separated from the cell A group (30). A group may be provided.

  The cell B group is composed of a cell (CE) having an uneven structure different from that of the cell A group (30), and may be provided with a flat surface or any uneven structure including a hologram.

  As the arbitrary concavo-convex structure, in addition to a flat surface or a hologram, for example, a plurality of concave portions or convex portions, the shape of the concave portion or convex portion is conical, pyramidal, elliptical cone, cylindrical or cylindrical, Prismatic or prismatic, truncated cone, truncated pyramid, truncated elliptical cone, cone or cylinder joined to cone, prism or prism joined to pyramid, hemisphere, semiellipsoid, Bullet-shaped, concave-convex structure consisting of a bowl-shaped shape and the like, concave-convex structure consisting of a plurality of linear recesses or protrusions aligned in the same direction, the height of the plurality of protrusions or the depth of the plurality of recesses is constant An uneven structure including a unit having a certain uneven structure can be exemplified, but the present invention is not necessarily limited thereto.

(Method of manufacturing display device)
An example of a manufacturing method for manufacturing a display device based on the display device uneven structure data including image components obtained as described above will be described.

  First, a metal stamper is manufactured as follows using a photolithography as a mold for forming an uneven structure.

First, a photosensitive resist material is applied to a smooth substrate (a glass substrate is generally used) to form a resist material layer having a uniform thickness. As the photosensitive resist material, a known positive type material or negative type material can be used. Next, a desired pattern based on the unevenness data for the display device is drawn on the resist material layer by the charged particle beam.

  Thereafter, by developing the resist material layer, a structure having a desired uneven structure is obtained.

  Next, using this structure as a master, a metal stamper is manufactured from the master by a method such as electroforming. Note that electroforming is a type of surface treatment technique in which an object to be electroformed is immersed in a predetermined aqueous solution, and a current is applied to form a metal film on the object by the reducing power of electrons.

  By using such a method, the fine uneven structure provided on the surface of the original plate can be accurately duplicated. The surface of the object to be electroformed needs to be able to conduct electricity, but since a photosensitive resist generally does not conduct electricity, before performing electroforming, sputtering, vacuum deposition, etc. A metal thin film is provided in advance by a vapor deposition method or the like.

  Next, using the stamper, the concavo-convex structure is duplicated on the surface of the relief structure forming layer. First, a thermoplastic resin, a thermosetting resin, a radiation-curable resin, or the like is applied on a light-transmitting substrate made of, for example, polycarbonate or polyester. Next, a metal stamper is brought into close contact with the coating film, and in this state, application of heat pressure, irradiation of light, an electron beam, or the like is performed. A relief structure forming layer is obtained.

  In the above description, photolithography was used as a method for manufacturing the original plate. However, as another method, a method of processing the surface of metal or the like by cutting, etching, or the like can be employed. By using such a method, it is possible to directly process the surface of a metal plate, and in this case, a metal stamper can be directly manufactured without manufacturing a metal stamper by a method such as electroforming. .

  Next, on the relief structure forming layer, for example, a metal such as aluminum or a dielectric or the like is deposited in a single layer or a multilayer by a vapor deposition method such as a vacuum evaporation method or a sputtering method to form a reflective layer.

  When only a part of the relief structure forming layer is covered with the reflective layer, for example, a method of forming the reflective layer as a continuous film by a vapor deposition method or the like, and then removing a part of the reflective layer with a chemical or the like is used. Can be obtained by With such a method, a display device can be manufactured.

  The display device obtained as described above may be appropriately provided with various known functional layers such as an intermediate layer, a printing layer, a protective layer, an adhesive layer or an adhesive layer, and the display device may be used alone. May be used, or may be used by being attached to some kind of article.

  As a method of attaching the display device to the article, the display device may be attached as a label via an adhesive or the like, or the display device may be manufactured as a configuration of a transfer foil (60) as illustrated in FIG. A method of sticking to an article may be adopted.

  The configuration of the transfer foil (60) illustrated in FIG. 10 is such that a peelable protective layer (62), a relief structure forming layer (63), a reflective layer (64), and an adhesive layer (65) are formed on a support (61). Has become.

As the material used for the support (61), various plastic films such as polyethylene terephthalate, polyethylene naphthalate, polycarbonate, triacetyl cellulose, polyvinyl alcohol, acryl, vinyl chloride, polypropylene, polycycloolefin, and polyimide are preferably used. Can be.

  The peelable protective layer (62) facilitates the peeling of the support (61) when transferring the transfer foil (60) to the transfer target, and also enhances the durability of the display device transfer layer (66) after the transfer. Has a role to secure.

  As the material of the release layer protective layer (62), for example, an acrylic resin, a polyester resin, a melamine resin, a polycarbonate resin, a vinyl resin, or the like can be used alone, as a mixture, or as a laminate.

  The peelable protective layer (62) may further contain various waxes such as paraffin wax, carnauba wax and polyethylene wax, and various additives such as metal soaps such as zinc stearate and silicones.

  For the relief structure forming layer (64), a thermoplastic resin, a thermosetting resin, a radiation curable resin, or the like can be suitably used.

  When a thermoplastic resin is used as the relief structure forming layer (64), for example, an acrylic resin, an epoxy resin, a cellulose resin, a vinyl resin, a mixture thereof, a copolymer thereof, or the like is used. can do.

  When a thermosetting resin is used, for example, a urethane resin, a melamine resin, or an epoxy resin formed by a crosslinking reaction between a polyol resin such as an acrylic polyol resin or a polyester polyol resin and an isocyanate compound. , A phenolic resin, a mixture thereof, or a copolymer thereof.

  Alternatively, when a radiation-curable resin is used, the radiation-curable resin typically contains a polymerizable compound and an initiator.

  As the polymerizable compound, for example, a compound capable of photoradical polymerization is used. Specifically, a monomer, oligomer or polymer having an ethylenically unsaturated bond or an ethylenically unsaturated group can be used. Alternatively, compounds capable of photoradical polymerization include 1,6-hexanediol, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol acrylate, pentaerythritol tetraacrylate, pentaerythritol pentaacrylate and dipentane. Monomers such as erythritol hexaacrylate, oligomers such as epoxy acrylate, urethane acrylate and polyester acrylate, or polymers such as urethane-modified acrylic resin and epoxy-modified acrylic resin may be used.

  When a compound capable of photoradical polymerization is used as the polymerizable compound, a photoradical polymerization initiator can be used as the initiator.

  As the photoradical polymerization initiator, for example, benzoin, benzoin-based compounds such as benzoin methyl ether and benzoin ethyl ether, anthraquinone-based compounds such as anthraquinone and methylanthraquinone, acetophenone, diethoxyacetophenone, benzophenone, hydroxyacetophenone, 1-hydroxy Phenylketone compounds such as cyclohexylphenylketone, α-aminoacetophenone and 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, benzyldimethylketal, thioxanthone, acylphosphine oxide, or , Michler's ketone and the like can be used.

  Alternatively, a compound capable of photocationic polymerization may be used as the polymerizable compound. As the compound capable of photocation polymerization, for example, a monomer, oligomer or polymer having an epoxy group, a compound containing a xetane skeleton, or vinyl ethers is used.

  When a compound capable of photocationic polymerization is used as the polymerizable compound, a photocationic polymerization initiator is used as the initiator. As the cationic photopolymerization initiator, for example, an aromatic diazonium salt, an aromatic iodonium salt, an aromatic sulfonium salt, an aromatic phosphonium salt or a mixed ligand metal salt is used.

  Alternatively, a mixture of a compound capable of photoradical polymerization and a compound capable of photocationic polymerization may be used as the polymerizable compound.

  In this case, as the initiator, for example, a mixture of a photoradical polymerization initiator and a photocationic polymerization initiator is used. Alternatively, in this case, a polymerization initiator that can function as an initiator for both photoradical polymerization and photocation polymerization may be used.

  As such an initiator, for example, an aromatic iodonium salt or an aromatic sulfonium salt is used.

  The ratio of the initiator in the radiation-curable resin is, for example, in the range of 0.1 to 15% by weight.

  Further, as an example in which a polymerization initiator is not used, a method of causing a polymerization reaction of a polymerizable compound by electron beam irradiation may be used.

  The radiation-curable resin is a sensitizing dye, a dye, a pigment, a polymerization inhibitor, a leveling agent, an antifoaming agent, a sagging agent, an adhesion enhancer, a coating surface modifier, a plasticizer, a nitrogen-containing compound, an epoxy resin, or the like. It may further include additives, release agents or combinations thereof.

  The radiation-curable resin may further contain a non-reactive resin in order to improve the moldability. As the non-reactive resin, for example, the above-mentioned thermoplastic resins and thermosetting resins can be used alone or as a mixture.

  As the reflective layer (64), a method of forming a metal thin film of Al, Sn, Cu, Au, Ag, Co, or the like by a vapor deposition method such as a vacuum evaporation method, a sputtering method, or an ion plating method, or the like, A method of forming a metal thin film into a pattern by making full use of an etching method or the like may be used.

Alternatively, as a transparent reflective layer, for example, Sb ₂ S ₃ , Fe ₂ O ₃ , TiO ₂ , CdS, CeO ₂ , ZnS, PbCl ₂ , CdO, Sb ₂ O ₃ , WO ₃ , SiO, Si ₂ O ₃ , Conventionally known dielectrics made of metal compounds such as In ₂ O ₃ , PbO, Ta ₂ O ₃ , ZnO, ZrO ₂ , Cd ₂ O ₃ , and Al ₂ O _3, such as a vacuum evaporation method, a sputtering method, and an ion plating method According to the method described above, a film formed as a thin film can be used.

  The adhesive layer (65) can be formed using a general heat-sensitive adhesive or a pressure-sensitive adhesive.

Examples of the heat-sensitive adhesive include (meth) acrylic resin, polyester resin, vinyl chloride-vinyl acetate copolymer resin, ethylene- (meth) acrylate copolymer resin, polyamide resin, polyolefin resin, and chlorine. It can be used alone or as a mixture of two or more of various resins such as a functionalized polyolefin resin, an epoxy resin, and a urethane resin.

  As the pressure-sensitive adhesive, for example, a vinyl chloride-vinyl acetate copolymer, polyester-based polyamide, acrylic, butyl rubber-based, natural rubber-based, silicone-based, polyisobutyl-based pressure-sensitive adhesive alone or alkyl methacrylate, Aggregation component such as vinyl ester, acrylonitrile, styrene, vinyl monomer, etc., modifying component represented by unsaturated carboxylic acid, hydroxy group-containing monomer, acrylonitrile and the like, adhesion-imparting material, filler, softener, heat stabilizer, oxidation Additives such as an inhibitor, a polymerization initiator, a curing agent, and a curing accelerator may be used as needed.

  Examples of the adhesion-imparting agent include a rosin resin, a terpene phenol resin, a terpene resin, an aromatic hydrocarbon-modified terpene resin, a petroleum resin, a coumarone / indene resin, a styrene resin, a phenol resin, and a xylene resin.

  Examples of the filler include zinc white, titanium oxide, silica, calcium carbonate, barium sulfate, and the like.

  Examples of the softener include a process oil, a liquid rubber, and a plasticizer. Examples of the heat stabilizer include benzophenones, benzotriazoles, and hindered amines. Examples of the antioxidants include anilides, phenols, phosphites, and thioesters.

  FIG. 11 shows an example of an article with a display device (70) using the transfer foil (60) obtained as described above, and a display device transfer layer ( 66) is illustrated.

  The display device transfer layer (66) has a portion having an optical effect corresponding to the movement of the light source (41) composed of the cell A group (30) and the cell B group (72) having the hologram image. .

  As a result, an article (70) with a display device having an unprecedented optical effect and having a high decorative property and a high anti-counterfeiting property is obtained using the same manufacturing process as that of the anti-counterfeit medium having the existing diffraction grating structure. be able to.

10: Fresnel lens-shaped uneven structure 10 ': One group of cells A1 before rearrangement
DESCRIPTION OF SYMBOLS 11 ... Base material 12 ... Relief structure forming layer 13 ... Reflective layer 15 ... Transition direction of pitch 16 ... Transition direction of orientation direction 20 ... One group of cells A1 after rearrangement
20a... A group of cells A1a after rearrangement
20b ... one group of cells A1b after rearrangement
20c ... one group of cells A1c after rearrangement
Reference Signs List 30 cell A group 31 overlapping part 40 display device 41 light source 42 observer 411, 412 moving direction of light source 50 reproduced image 51, 52 moving direction of reproduced image 60 transfer foil 61 support 62 ... Removable protective layer 63 ... Relief structure forming layer 64 ... Reflective layer 65 ... Adhesive layer 66 ... Display device transfer layer 70 ... Article with display device 71 ... Transferee 72 ... Cell B group 80 ... Fresnel lens structure device 81 ... Collection Light point 82 ... Fresnel lens device reproduced image 821, 822 ... Fresnel lens device reproduced image moving direction CE, CE1, CE2, CE3 ... Cell CE20a ... One cell of group A1a after rearrangement CE20b ... After rearrangement One cell of the group of cells A1b CE20c ... one of the group of cells A1c after the rearrangement Le

Claims (4)

A display device having a relief structure forming layer having an uneven structure on the surface and a reflective layer formed so as to cover at least a part of the surface on which the uneven structure is formed,
The uneven structure includes a plurality of cells arranged,
At least a part of the plurality of cells is a group of cells A having at least a concavo-convex structure that is a part of the concavo-convex structure of a Fresnel lens-shaped concentric pattern,
The cell A group is composed of two or more groups of cells A1. The group of cells A1 has a concavo-convex structure obtained by dividing a concentric concavo-convex pattern provided in a single Fresnel lens shape into an arbitrary number. Each carried at least in the cell,
In the group of cells A1, according to the orientation direction of the concave-convex structure of each cell and the pitch of the concave-convex structure, the cells are rearranged on coordinates that are coordinate axes where the orientation direction and the pitch are orthogonal to each other. Display device to be characterized.   When the display device is irradiated with light from a specific direction using a light source, diffracted light is emitted by the uneven structure provided in each cell of the cell A group, and a plurality of high brightness The display device according to claim 1, wherein a reproduced image as an arbitrary image including image points is visually recognized.   When the position of the light source that irradiates the display device with light is moved in an arbitrary direction with respect to the display device, the position of the reproduced image is a direction orthogonal to the direction in which the light source moves. The display device according to claim 1, wherein the display device moves to the display device. The plurality of cells further includes a cell B group,
4. The display device according to claim 1, wherein the cell group B has an arbitrary concave / convex structure including a flat surface, different from the concave / convex structure carried by the cell A group. 5.

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