JP7069744B2 - Display device - Google Patents

Description

The present invention relates to structures based on optical techniques that provide anti-counterfeiting, decorative, or aesthetic effects.

In the fields of securities, certificates, branded goods, dedicated consumables or replacement parts for electronic devices and various machines, and personal authentication media, it is desired that counterfeiting or alteration is difficult.
Therefore, in such a field, an optical structure having an excellent anti-counterfeiting effect may be supported.

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

In addition, these microstructures are difficult to analyze, and forgery is also difficult because expensive equipment such as an electron beam drawing device is required to manufacture them. Therefore, these optical structures can exhibit an excellent anti-counterfeiting effect.

As a technique related to such a structure, for example, Patent Document 1 proposes a technique of dividing a pixel into three as an RGB channel and expressing a color image of photographic image quality with a diffraction structure by the area gradation inside the channel. ..
However, nowadays, hologram production technology has become widespread, and even if it is not possible to make exactly the same thing with only holographic images with photographic image quality, there is a possibility that a fake that can give a similar impression at first glance can be made. Therefore, the anti-counterfeiting effect is becoming smaller.

Further, Patent Document 2 proposes to generate a more complicated optical effect 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.

Japanese Unexamined Patent Publication No. 8-21821 Japanese Unexamined Patent Publication No. 2015-135519

Based on the above problems, the main focus of the present invention is as a display device that can be used in the field of anti-counterfeiting, which constantly requires new functions, without requiring a complicated manufacturing process, and at a relatively low cost. The purpose is to provide a display device that can exert an unprecedented visual effect and to realize a higher anti-counterfeiting effect.

The present invention has been made to solve these problems.
That is, the invention according to claim 1 has at least a relief structure forming layer having a concavo-convex structure on the surface and a reflective layer formed so as to cover at least a part of the surface on which the concavo-convex structure is formed. In a device, the concavo-convex structure comprises a plurality of arranged cells, and at least a part of the plurality of cells is a concavo-convex structure which is a part of a concentric pattern concavo-convex structure provided in a frennel lens shape. The cell A group is composed of two or more groups of cells A1, and the group of cells A1 has an arbitrary concavo-convex pattern having a concentric pattern provided in a single Frenel lens shape. Each cell is supported by at least a concavo-convex structure divided into numbers, and each cell in the group of cells A1 maintains an arrangement position capable of forming a concentric pattern provided in the Frenel lens shape. It is a display device characterized in that the orientation direction of the concavo-convex structure provided inside is inverted in either the left-right or up-down direction in each cell plan view and rearranged.

According to the second aspect of the present invention, in the rearrangement of each cell in the cell A1 of the group, at least each cell in the cell A1 of a single group is inverted and rearranged in the same direction. The display device according to claim 1.

According to the third aspect of the present invention, in the cell A group consisting of the two or more groups of cells A1, the center positions of the concentric circle patterns of the cell A1 in the group are arranged at different positions, and the pattern can be displayed. The display device according to claim 1 or 2, wherein the display device is arranged in.

In the invention according to claim 4, the uneven structure of the concentric circle pattern provided in the shape of the Frenel lens is divided into an arbitrary number, and the rearranged uneven structure is irradiated with light from an arbitrary direction using a light source. When a high-intensity image point is observed in the direction in which the light source and the center of the concentric pattern face each other and the light irradiation direction with respect to the display device plane is rotated, the rotation direction of the light source is The display device according to any one of claims 1 to 3, wherein the movement of the high-luminance image point is observed in the opposite rotation direction.

In the invention according to claim 5, the plurality of cells further include a cell B group, and the cell B group has an arbitrary uneven structure including a flat surface, unlike the concave-convex structure carried by the cell A group. The display device according to any one of claims 1 to 4, wherein the display device is provided.

According to the first and second inventions, the appearance of high-intensity image points observed from the positional relationship between the illumination applied to the display device and the observer changes the position of the illumination or the like, unlike the conventional case. Allows new visual effects to be provided.

According to the third and fourth inventions, the entire image formed by high-brightness image points can give an unprecedented movement and provide a new visual effect by changing the position of lighting or the like. ..

According to the fifth invention, a portion having a new visual effect created by rearranging the concentric circular pattern uneven structure provided in a Fresnel lens shape and an image such as a hologram are combined to provide higher decorativeness. , The anti-counterfeiting effect can be improved.

It is a top view which shows the example of the concavo-convex structure like a Fresnel lens. It is sectional drawing which shows the example of the cut surface of AA' of FIG. It is a top view which shows the example of the cell A1 of one group before the rearrangement. It is a top view which shows the example of the cell A1 of a group which inverted each cell in the left-right direction. It is a top view which shows the example of the cell A1 of a group which inverted each cell in the vertical direction. It is a conceptual diagram of the cell A group by one group cell A1 after a plurality of rearrangement. This is an example of a cell in an overlapping portion of a group of cells A1 after a plurality of rearrangements. It is a conceptual diagram which shows the observation method of a display device. It is a conceptual diagram which shows the example of the image formation by a plurality of high-luminance image points. It is sectional drawing which shows the example of the transfer foil composition. FIG. 3 is a plan view showing an example of an article provided with a display device. It is a conceptual diagram which shows the example of the image formation by the conventional Fresnel lens application.

Hereinafter, embodiments of the present invention will be described in detail. Although the drawings are appropriately referred to in the following description, the embodiments described in the drawings are examples of the present invention, and the present invention is not limited to the embodiments described in these drawings.

All the components exhibiting the same or similar functions are designated by the same reference numerals throughout the drawings, and duplicate description will be omitted.

FIG. 1 is a plan view showing an example of an uneven structure of a concentric circular pattern provided in a Fresnel lens shape in the present invention, and FIG. 2 is a cross-sectional view showing an example of an AA'cut surface in FIG.

The concave-convex structure of the concentric pattern provided in the shape of a Fresnel lens is provided by changing the pitch of each concentric circle from the central portion of the concentric circle to the outer edge thereof.

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

The base material (11) does not necessarily have to be provided, and may be composed of only the relief structure forming layer (12) and the reflective layer (13), or may be further on the reflective layer (13). A protective layer, an intermediate layer, an adhesive layer, or the like may be provided. A detailed description of the materials of each 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 blazeed shape, but is not necessarily limited to such a shape, and is not necessarily limited to such a shape. , Polygon, sine curve, bowl, spindle, semi-circle, etc. may be provided in any shape.

(Method and effect of creating uneven structure for display device)
The method and effect of creating the concave-convex structure for the display device of the present invention will be described with reference to FIGS. 3 to 9.

FIG. 3 is a plan view showing a group of cells A1 (20) arranged in a Fresnel lens shape before rearrangement.

A group of cells A1 (20) before rearrangement is divided into an arbitrary number of cells (CE), and each cell (CE) has a partial structure of a concentric pattern uneven structure provided in a Fresnel lens shape. Each is carried.

Here, the uneven structure supported in each cell (CE) may be provided in a curved shape as shown in FIG. 3, but is sufficient for the circumference of the concentric circles before rearrangement. When it is divided into cells (CE) having a small size, it may be provided substantially linearly.

Further, in FIG. 3, the boundary line of each cell (CE) is shown, but in reality, such a boundary line does not exist, and there is only a region divided as each cell (CE).

Each cell (CE) in the cell A1 (20) of the group before rearrangement keeps the arrangement position, and the orientation of the uneven structure provided in each cell is left or right or left or right in the plan view of each cell. Invert it upside down and relocate it.

FIG. 4 shows an example in which the orientation of the concavo-convex structure provided in each cell is reversed in the left-right direction in the plan view of each cell, and rearrangement is performed.

That is, the arrangement position of each cell (CE) in FIG. 3 is held as it is, and only the direction of the uneven structure provided in the cell is inverted in the left-right direction.

Similarly, FIG. 5 shows an example in which the concavo-convex structure provided in each cell is rearranged by reversing the direction in the vertical direction.

By carrying out the rearrangement in this way, although the light condensing effect generated when the reflective layer is provided along the uneven surface having the Fresnel lens structure cannot be exhibited, a high-brightness image due to diffraction of light or the like cannot be exhibited. It has been found that it is possible to observe points and generate an optical effect different from the image expression applying the conventional Fresnel lens structure.

Specifically, for example, as shown in FIG. 6, a plurality of cells A1 (30) in a group in which each cell is inverted in the left-right direction and rearranged are arranged to form cell A group (60).

At this time, a plurality of groups of cells A1 (30a, 30b, 30c) are arranged so as to be a pattern such as a number, a character, a symbol, or a pattern to be expressed.

As a result, any number, characters, symbols, patterns, etc. are included by the plurality of high-intensity image points derived from the plurality of cells A1 (30a, 30b, 30c, etc.) constituting the cell A group (60). It is possible to express a picture.

The pattern thus obtained is expressed as a pattern that can be moved according to the movement of the light source (51).

That is, when the position of the observer (52) and the position of the display device (50) are fixed, the cell (CE) that emits observable diffracted light by moving the position of the light source (51) is different. It changes to the cell (CE) of, and it becomes possible to observe it as the movement of a high-intensity image point.

For example, when the light source (51) is moved left and right with respect to the center of a group of cells A1 (30 or 40) after rearrangement, the high-intensity image point also moves left and right, and the radial direction, that is, the outside with respect to the center. When moved to, the high-brightness image point also moves outward.

At this time, when the cells (CE) were rearranged, the arrangement order of the cells (CE) from the center of the concentric circles to the outer edge was maintained, so that the light source (51) was moved while observing. It is possible to move the high-brightness image point at the time smoothly without any discomfort.

Here, as shown in FIG. 6, the cells A1 (30a, 30b, 30c) of each group in the cell A group (60) may overlap each other to form an overlapping portion (62).

FIG. 7 shows an example of the state of the cell (CE) in the overlapping portion (62). Each cell (CE30a, CE30b, CE30c) carries a concavo-convex structure constituting one group of cells A1 (30a, 30b, 30c), and the arrangement of each cell is such that each cell A1 (30a, 30a, 30c) is arranged. The rearrangement is performed while maintaining the arrangement of the cells after the rearrangement in 30b, 30c).

At this time, depending on the situation, the cells in the cells A1 (30a, 30b, 30c) of each group may be arbitrarily thinned out and combined, or in a single cell depending on the situation. In addition, the concavo-convex structure corresponding to each group of cells A1 (30a, 30b, 30c) may be mixed by multiplex synthesis.

Further, the size of each cell (CE) can preferably be one having a side of about 10 μm or more and 100 μm or less, but is not necessarily limited to this.

Each of the cells A1 (for example, 30a, 30b, 30c) of each group provided in the cell A group (60) can form a high-brightness image point in two directions due to the ± primary diffracted light. For example, cells A1 (30a, 30b, 30c) of each group so as to have a pattern such as a number, a character, a symbol, a pattern, etc. to be expressed by a high-luminance image point formed by + 1st-order diffracted light. Place the center of rotation of.

As shown in FIG. 8, the display device (50) provided with the cell A group (60) thus obtained is irradiated with light from a specific direction using the light source (51), and the observer. When (52) is observed, two images are observed, one is a picture formed by high-intensity image points made up of +1-order diffracted light and the other is a picture formed by high-intensity image points made up of -1st-order diffracted light.

FIG. 9 shows an example of a pattern that is observed when the display device (50) is irradiated with light.

When the display device (50) is irradiated with light from the direction of the light source (51a), two star-shaped pattern patterns consisting of ± 1st-order diffracted light along the direction in which the light source and the display device face each other ( 55a) is observed.

After that, when the light irradiation direction is rotationally moved and the light is irradiated from the direction of the light source (51b), two star-shaped pattern patterns (55b) are similarly observed, but the stars move as the light source moves. When the pattern of the pattern is observed to move, the moving direction of the light source (53) and the moving direction of the pattern (54) are observed to be opposite to each other.

That is, when the light source (51) is moved counterclockwise with respect to the display device (50), the observed pattern is moved clockwise.

This is because the rotational movement direction (53) of the light source and the movement direction (57) of the pattern pattern are the same when a similar pattern is expressed by applying a conventional Fresnel lens as shown in FIG. Is to provide a clearly different visual effect, and it is possible to provide an effective means even when performing an authenticity determination or the like.

Here, the image (55a or 55b) observed by ± 1st order diffraction is drawn by a solid line, but in reality, for example, a point drawing in which star-shaped contours are connected by high-luminance image points. It becomes possible to observe as.

The pattern consisting of the high-intensity image points observed in this way can be moved as described above while maintaining the relative shape according to the movement of the light source (51). For example, the light source (51) can be moved. ) Is moved away from or closer to the display device (50), the observed pattern can be made larger or smaller, and the depth can be changed.

In addition, as described above, the cross-sectional shape of the uneven structure provided in the cell is arbitrary, such as a blazed shape, a triangle, a rectangle, a polygon, a sine curve, a bowl, a spindle, and a semicircle. In particular, in the case of a blazed shape, it is possible to provide a difference in the diffraction light intensity of the + order and the-order of the diffraction light. Therefore, for example, only the +1th order diffraction light is mainly emitted. It is possible to widen the range of expression by the diffracted light.

Therefore, a method such as providing a concavo-convex structure having a different cross-sectional shape may be used in each group of cells A1 (30 or 40) according to the pattern to be displayed.

Further, in the display device (50) having the cell A group (60), a plurality of cell A groups may be juxtaposed, and further, the cell B is located adjacent to or separated from the cell A group (60). A group may be provided.

The cell B group is composed of a cell (CE) having a concavo-convex structure different from that of the cell A group (60), and may be provided with an arbitrary concavo-convex structure including a flat surface and a hologram.

The arbitrary uneven structure includes, for example, a plurality of concave portions or convex portions, and the shape of the concave or convex portions is conical, square cone, elliptical cone, columnar or cylindrical, in addition to a flat surface or a hologram. A prism or a cylinder, a cone, a cone, a cone, an ellipse, a cylinder or a cylinder with a cone joined, a prism or a cylinder with a cone joined, a hemisphere, a semi-elliptical body, Concavo-convex structure consisting of bullet-shaped or bowl-shaped, concave-convex structure consisting of multiple linear concave or convex parts with the same direction, height of multiple convex parts or depth of multiple concave parts is constant An uneven structure composed of a unit having a certain uneven structure can be exemplified, but the present invention is not limited to these.

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

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

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 film thickness. As the photosensitive resist material, a known positive type material or negative type material can be used. Then, a desired pattern based on the uneven structure data for the display device is drawn on the resist material layer by the charged particle beam.

Then, the resist material layer is developed to obtain a structure having a desired uneven structure.

Next, using this structure as an original plate, a metal stamper is produced from this original plate by a method such as electroforming. In addition, electroforming is a kind of surface treatment technique in which an object to be electroformed is immersed in a predetermined aqueous solution and energized to form a metal film on the object by the reducing power of electrons.

By using such a method, it is possible to accurately duplicate the fine uneven structure provided on the surface of the original plate. The surface of the object to be electroformed needs to be energized, but in general, the photosensitive resist does not conduct electricity, so before electroforming, the surface of the structure is subjected to sputtering, vacuum deposition, etc. A metal thin film is provided in advance by a vapor deposition method or the like.

Then, using this stamper, the uneven structure is duplicated on the surface of the relief structure forming layer 12. First, a thermoplastic resin, a thermosetting resin, a radiation curable resin, or the like is applied onto a light-transmitting base material 11 made of, for example, polycarbonate or polyester. Next, a metal stamper is brought into close contact with the coating film, heat pressure is applied in this state, irradiation with light or an electron beam is performed, and then the metal stamper is peeled off from the resin layer to provide an uneven structure. The relief structure forming layer 12 is obtained.

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

Next, a metal such as aluminum or a dielectric is deposited on the relief structure forming layer (12) in a single layer or in multiple layers by, for example, a vapor deposition method such as a vacuum vapor deposition method or a sputtering method, and a reflective layer (13) is deposited. ) Is formed.

When only a part of the relief structure forming layer (12) is covered with the reflective layer (13), for example, after forming the reflective layer (13) as a continuous film by a vapor phase deposition method or the like, a chemical or the like is used. It can be obtained by a method such as removing a part thereof. A display device can be manufactured by such a method.

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. It may be used, or it may be attached to some kind of article and used.

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 produced as the configuration of the transfer foil (70) as illustrated in FIG. A method of being attached to an article may be taken.

The configuration of the transfer foil (70) exemplified in FIG. 10 consists of a peelable protective layer (72), a relief structure forming layer (73), a reflective layer (74), and an adhesive layer (75) on a support (71). It has become.

Materials used for the base material (11) or support (71) include various plastics such as polyethylene terephthalate, polyethylene naphthalate, polycarbonate, triacetyl cellulose, polyvinyl alcohol, acrylic, vinyl chloride, polypropylene, polycycloolefin, and polyimide. A film can be preferably used.

The peelable protective layer (72) facilitates peeling of the support (71) when the transfer foil (70) is transferred to the transferred object, and also provides durability of the display device transfer layer (76) after transfer. It plays a role in securing. As the material of the peelable protective layer (72), 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.

Further, the peelable protective layer (72) may further contain additives such as paraffin wax, carnauba wax, polyethylene wax and silicone.

As the relief structure forming layer (74, 12), a thermoplastic resin, a thermosetting resin, a radiation curable resin, or the like can be preferably used.

When a thermoplastic resin is used as the relief structure forming layer (74, 12), for example, an acrylic resin, an epoxy resin, a cellulosic resin, a vinyl resin, etc., a mixture thereof, or a copolymer thereof, etc. Can be used.

When a thermosetting resin is used, for example, a urethane resin, a melamine resin, or an epoxy resin formed by a cross-linking reaction between a polyol resin such as an acrylic polyol resin or a polyester polyol resin and an isocyanate compound. , Phenolic resins and the like, mixtures thereof, or copolymers thereof can be used.

Alternatively, when using a thermosetting resin, the thermosetting resin typically comprises 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, as compounds capable of photoradical polymerization, 1,6-hexanediol, neopentyl glycol diacryllate, trimerol propanthriacrilate, pentaerythritol acrylate, pentaerythritol tetraacryllate, pentaerythritol pentaacrylate and Monomers such as dipentaerythritol hexaacryllate, oligomers such as epoxyacryllate, urethaneacryllate and polyesteracryllate, 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.

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

Alternatively, as the polymerizable compound, a compound capable of photocationic polymerization may be used. As the compound capable of photocationic polymerization, for example, a monomer having an epoxy group, an oligomer or a polymer, a xetane skeleton-containing compound, 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 photocationic polymerization 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, as the polymerizable compound, a mixture of a compound capable of photoradical polymerization and a compound capable of photocationic polymerization may be used.

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 photocationic 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 to the radioactively cured 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 inducing a polymerization reaction of a polymerizable compound by irradiation with an electron beam may be used.

The radiation-curable resin includes sensitizing dyes, dyes, pigments, polymerization inhibitors, leveling agents, defoaming agents, sagging inhibitors, adhesion improvers, coating surface modifiers, plasticizers, nitrogen-containing compounds, epoxy resins and the like. Additives, mold release agents or combinations thereof may be further contained.

Further, the radiation-curable resin may further contain a non-reactive resin in order to improve its moldability. As the non-reactive resin, for example, the thermoplastic resin, the thermosetting resin, or the like can be used alone or as a mixture.

As the reflective layer (74, 13), for a method of forming a metal thin film such as Al, Sn, Cu, Au, Ag, Co by a vacuum vapor deposition method, a sputtering method, an ion plating method, or the like, or for these metal thin films. A method of forming 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 , Al ₂ O ₃ are vacuum vapor deposition method, sputtering method, ion plating method and the like. According to the above method, a thin film formed or the like can be used.

The adhesive layer 75 can be formed by using a general heat-sensitive adhesive, a pressure-sensitive adhesive, or the like.

Examples of the heat-sensitive adhesive include acrylic resins, polyester resins, vinyl chloride-vinyl acetate copolymer resins, ethylene-acrylic acid ester copolymer resins, ethylene-methacrylic acid ester copolymer resins, polyamide resins, and polyolefins. It can be used alone or as a mixture of two or more kinds of various resins such as a based resin, a chlorinated polyolefin resin, an epoxy resin, and a urethane resin.

The pressure-sensitive adhesive may be, for example, a vinyl chloride-vinyl acetate copolymer, a polyester-based polyamide, an acrylic-based, a butyl rubber-based, a natural rubber-based, a silicon-based, or a polyisobutyl-based pressure-sensitive adhesive alone, or an alkyl methacrylate or vinyl. Aggregating components such as esters, acrylonitrile, styrene, vinyl monomers, unsaturated carboxylic acids, hydroxy group-containing monomers, modifying components typified by acrylonitrile, adhesive-imparting materials, fillers, softeners, heat stabilizers, antioxidants Additives such as an agent, a polymerization initiator, a curing agent, and a curing accelerator may be added as needed.

Examples of the adhesive-imparting agent include rosin-based resin, terpene phenol-based resin, terpene resin, aromatic hydrocarbon-modified terpene resin, petroleum resin, kumaron-inden resin, styrene-based resin, phenol-based resin, and xylene resin.

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

Examples of the softener include process oils, liquid rubbers, and plasticizers. Examples of the heat stabilizer include benzophenone type, benzotriazole type and hindered amine type, and examples of the antioxidant include anilides type, phenol type, phosphite type and thioester type.

In FIG. 11, as an example of the article (80) with a display device using the transfer foil (70) obtained as described above, the display device transfer layer (is shown on the transferred body (81) such as a gift certificate. An example provided with 76).

The display device transfer layer (76) has a portion having an optical effect according to the movement of the light source (51) composed of the cell A group (60) and a cell B group (82) having a hologram image. ..

As a result, an article (80) with a display device having an unprecedented optical effect, high decorativeness and high anti-counterfeiting property can be obtained while using the same manufacturing process as the existing anti-counterfeiting medium having a diffraction grating structure. be able to.

10 ... Fresnel lens-shaped uneven structure 11 ... Base material 12 ... Relief structure forming layer 13 ... Reflective layer 20 ... Group of cells A1 before rearrangement
30 ... A group of cells A1 in which each cell is inverted left and right.
30a ... A group of cells A1a after rearrangement
30b ... A group of cells A1b after rearrangement
30c ... A group of cells A1c after rearrangement
40 ... A group of cells A1 in which each cell is turned upside down.
50 ... Display device 51, 51a, 51b ... Light source 52 ... Observer 53 ... Light source moving direction 54 ... High-intensity image point moving direction (opposite to the light source moving direction)
55a, 55b ... Image formed by high-brightness image points 56 ... Display device to which a conventional Fresnel lens is applied 57 ... Moving direction of high-brightness image points (the same direction as the moving direction of the light source)
60 ... Cell A group 62 ... Overlapping part 70 ... Transfer foil 71 ... Support 72 ... Detachable protective layer 73 ... Relief structure forming layer 74 ... Reflective layer 75 ... Adhesive layer 76 ... Display device Transfer layer 80 ... Article with display device 81 ... Transferred body 82 ... Cell B group CE ... Cell CE30a ... One cell of cell A1a after rearrangement CE30b ... One cell of cell A1b after rearrangement CE30c ... One group after rearrangement One cell of cell A1c

Claims (5)

A display device having at least 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 consists of a plurality of arranged cells.
A group of cells A having at least a concavo-convex structure in which at least a part of the plurality of cells is a part of the concavo-convex structure of a concentric circular pattern provided in a Fresnel lens shape.
The cell A group is composed of two or more groups of cells A1, and the group cell A1 has a concavo-convex structure obtained by dividing a concentric pattern concavo-convex structure provided in a single Fresnel lens shape into an arbitrary number. At least carry on each cell,
Each cell in the group of cells A1 maintains an arrangement position capable of forming a concentric pattern provided in the Fresnel lens shape, and the orientation direction of the uneven structure provided in each cell is viewed in a plan view of each cell. A display device characterized in that it is inverted in either the left-right or up-down direction and rearranged. The first aspect of claim 1, wherein in the rearrangement of each cell in the group of cells A1, each cell in at least a single group of cells A1 is inverted and rearranged in the same direction. Display device. In the cell A group consisting of the two or more groups of cells A1, the center positions of the concentric patterns of the cells A1 in the group are arranged at different positions.
The display device according to claim 1 or 2, wherein the pattern is arranged so as to be displayable. When the uneven structure of the concentric pattern provided in the Frenel lens shape is divided into an arbitrary number and the rearranged uneven structure is irradiated with light from an arbitrary direction using a light source, the light source and the concentric pattern are used. When a high-intensity image point is observed in the direction facing the center of the light source and the light irradiation direction with respect to the display device plane is rotationally moved, the high-intensity is in the direction opposite to the rotation direction of the light source. The display device according to any one of claims 1 to 3, wherein the movement of an image point is observed. The plurality of cells further include cell B group.
The display device according to any one of claims 1 to 4, wherein the cell B group has an arbitrary uneven structure including a flat surface, unlike the concave-convex structure carried by the cell A group.

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