JP6969296B2 - 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 forgery 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 concavo-convex concavo-convex structure provided in a Frenel 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 concentric concavo-convex structure provided in a single Frenel lens shape. A concavo-convex structure divided into numbers is carried at least in each cell, and the arrangement of each cell in the group of cells A1 holds the orientation of the concavo-convex structure in each cell, and the outer edge from the center of the concentric circle. While maintaining the arrangement order of each cell toward, the cells of the cell A1 of the first group are moved in parallel and rearranged in an arbitrary angular direction with the center of the concentric circle as the center of rotation. It is a display device characterized by this.

In the invention according to claim 2, in the cell A group consisting of the two or more groups of cells A1, the positions of the rotation centers of the cells A1 in the group are arranged at different positions, and numbers, letters, and symbols are arranged. , The display device according to claim 1, wherein a pattern including a pattern is arranged so as to be displayable.

According to the third aspect of the present invention, the concentric concavo-convex structure provided in the Frenel lens shape is divided into an arbitrary number, and the rearranged concavo-convex structure is irradiated with light from an arbitrary position using a light source. When a high-intensity image point is observed and the light source is moved from the direction in which the light source and the center of the concentric circle face each other to a position shifted in the angular direction in which the cell is moved in parallel. The display device according to claim 1 or 2, wherein the movement of the high-luminance image point is observed according to the movement direction of the light source.

In the invention according to claim 4, 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 3, wherein the display device is provided.

According to the first invention, the appearance of high-brightness image points observed from the positional relationship between the illumination radiated to the display device and the observer is different from the conventional one, and is new by changing the position of the illumination or the like. Can provide a variety of visual effects.

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

According to the fourth invention, a portion having a new visual effect created by rearranging a concentric concavo-convex structure provided in a Fresnel lens shape and an image such as a hologram are combined to provide higher decorativeness. It is possible to improve the anti-counterfeiting effect.

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 moved in parallel in the direction of 45 °. It is a top view which shows the example of the cell A1 of a group which moved in parallel in a 90 ° direction. It is a conceptual diagram which shows the observation method of a display device. It is a conceptual diagram which shows the high-luminance image point when the Fresnel lens is used. It is a conceptual diagram of the cell A group by one group cell A1 after a plurality of rearrangement. It is an example of a cell in the overlap part of the cell A1 of one group after a plurality of rearrangements. It is a conceptual diagram which shows the example of the image formation by a plurality of high-luminance image points. 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.

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 a concentric concave-convex structure 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 concentric concave-convex structure 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 a concentric concavo-convex structure (10) 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, 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 uneven 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, and is a rectangle including a triangle. , Polygon, sine curve, bowl, spindle, semi-circle, etc. may be provided.

(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 part of a concentric concave-convex 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 of each cell (CE) is shown by a alternate long and short dash line, but such a boundary line does not actually 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 orientation of the uneven structure provided in the cell (CE), and further, each toward the outer edge from the center of the concentric circles. While maintaining the arrangement order of the cells (CE), each cell (CE) is translated in an arbitrary angular direction with the center of the concentric concavo-convex structure (10) as the center of rotation.

FIG. 4 is a plan view showing a group of cells A1 (30) after rearrangement in which each cell (CE) is translated in a direction of 45 °.

It can be seen that the two cells (CE1, CE2) in FIG. 3 are translated in the direction of 45 ° and rearranged as two cells (CE1', CE2') at different positions in FIG. ..

Similarly, FIG. 5 shows an example of a group of cells A1 (40) after relocation that are translated in the 90 ° direction, and the two cells (CE1, CE2) in FIG. 3 are different. It is rearranged as two cells (CE1 ", CE2") at the position.

By rearranging each cell (CE) in the cell A1 (20) of the group before the rearrangement in this way, the cell A1 (20) of the group before the rearrangement and the cell of the group after the rearrangement are relocated. It has different optical characteristics from A1 (30 and 40).

That is, as shown in FIG. 6, when the display device (50) is irradiated with light from a certain angle using the light source (51) and the observer (52) observes the display device (50) from a specific angle. At that time, for example, the light radiated to the cell A1 (20) of the group before the rearrangement is, as shown in FIG. Points can be displayed.

At this time, in the case of a group of cells A1 (20) before rearrangement, a high-intensity image point is observed as a focusing point (FP) in the direction facing the position of the light source (51). ..

On the other hand, in the cell A1 (30 and 40) of the group after the rearrangement, the light source (51) irradiates the cells A1 (30 and 40) according to the position of the light source (51) and the position of the observer (52). Two high-intensity image points due to ± primary diffracted light, which are diffracted light from a particular cell (eg CE1'), are observed.

However, as described above, the cross-sectional shape of the concave-convex 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 diffracted light intensity of the + order and the-order of the diffracted light. It is possible to widen the range of expression by the diffracted light.

Further, the position of the high-luminance image point observed as described above is a position shifted from the direction in which the light source (51) and the center of the concentric circle before rearrangement face each other in the angular direction in which each cell is translated. Will be.

The shift direction of the high-luminance image point at this time changes according to the angular direction in which each cell is translated.

Further, when the position of the observer (52) and the position of the display device (50) are fixed, the cell (for example, CE1') that emits observable diffracted light by moving the position of the light source (51). ) Changes to another cell (CE), and it becomes possible to observe it as the movement of a high-intensity image point.

That is, when the light source (51) is moved left and right with respect to the center of the cell A1 (30 or 40) of the group after the rearrangement, the high-luminance 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) are rearranged, the light source (51) is moved in parallel while maintaining the arrangement order of the cells (CE) from the center of the concentric circles to the outer edge. It is possible to make the movement of the high-brightness image point when observing while moving it smooth without any discomfort.

FIG. 8 shows an example in which image formation is performed using a plurality of rearranged cells A1 (30a, 30b, 30c) as the cell A group (60).

The cell A group (60) is composed of a combination of a plurality of rearranged cells A1 (30a, 30b, 30c).

Arbitrary patterns including numbers, characters, symbols, patterns, etc. are expressed by a plurality of high-intensity image points derived from a plurality of cells A1 (30a, 30b, 30c, etc.) constituting the cell A group (60). It becomes possible to do.

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

Here, as shown in FIG. 8, 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. 9 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.

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

A pattern formed by high-intensity image points observed when light is applied from a light source (51) to a display device (50) provided with the cell A group (60) thus obtained. Examples of the above are shown in FIGS. 10 and 11.

FIG. 10 shows an example in which the rearrangement of cells (CE) is translated by about 45 ° in the clockwise direction in each group of cells A1 (for example, 30a, 30b, 30c). The image (56) and -1st order diffraction observed by +1st order diffraction at a position shifted by about 45 ° in the clockwise direction with respect to the assumed image (55) at the position facing the light source (51). The image (57) observed by the above can be observed.

Here, the images (56, 57) observed by ± 1st order diffraction are drawn with solid lines, but in reality, for example, as a pointillism drawing in which star-shaped contours are connected by high-luminance image points. It becomes possible to observe.

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.

FIG. 11 shows an example in which the rearrangement of the cells (CE) is translated by about 45 ° in the counterclockwise direction in the cells A1 (for example, 30a, 30b, 30c) of each group. The image (56) observed by +1st order diffraction and -1st order diffraction at a position displaced by about 45 ° in the counterclockwise direction with respect to the assumed image (55) at the position facing the light source (51). It becomes possible to observe the image (57) observed by.

In this way, by changing the cell (CE) rearrangement conditions in the cells A1 of each group, it is possible to display the patterns at different positions, and it is possible to express complicated patterns by combining them. ..

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

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. Next, 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, a photosensitive resist does not conduct electricity, so before electroforming, sputtering, vacuum vapor deposition, etc. are performed on the surface of the structure. 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 to form a reflective layer 13. ..

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 part of the reflective layer 13 is removed by a chemical or the like. It can be obtained by such methods. 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 print 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 adopted.

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

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 projection 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 pentaacryllate 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 iodinenium 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 may be a sensitizing dye, a dye, a pigment, a polymerization inhibitor, a leveling agent, a defoaming agent, a sagging inhibitor, an adhesion improver, a coating surface modifier, a plasticizer, a nitrogen-containing compound, an epoxy resin, or 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.

Or, 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 such as vacuum deposition method, sputtering method, ion plating method, etc. 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 resin, polyester resin, vinyl chloride-vinyl acetate copolymer resin, ethylene-acrylic acid ester copolymer resin, ethylene-methacrylate ester copolymer resin, polyamide resin, and polyolefin. It can be used alone or as a mixture of two or more kinds of various resins such as based resin, chlorinated polyolefin resin, epoxy resin and 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, xylene resin and the like.

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, hindered amine type and the like, 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 object (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 rearranged at a position of 45 °
40 ... A group of cells A1 rearranged at 90 °
CE ... Cell CE1, CE1', CE1 "... Cell 1
CE2, CE2', CE2 "... Cell 2
FP ... Condensing point (high-brightness image point)
50 ... Display device 51 ... Light source 52 ... Observer 55 ... Assumed image at the position facing the light source 56 ... Image observed by +1 primary diffraction 57 ... Image observed by -1st order diffraction 60 ... Cell A group 30a ... Re One group of cells A1a after placement
30b ... A group of cells A1b after rearrangement
30c ... A group of cells A1c after rearrangement
CE30a ... One cell of one group of cells A1a after rearrangement CE30b ... One cell of one group of cells A1b after rearrangement CE30c ... One cell of one group of cells A1c after rearrangement 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 ... Transferee 82 ... Cell B group

Claims (4)

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 a concentric concavo-convex structure provided in a Fresnel lens shape.
The cell A group is composed of two or more groups of cells A1, and the group of cells A1 is formed by dividing a concentric uneven structure provided in a single Fresnel lens shape into an arbitrary number. At least carry each in the cell,
While the arrangement of each cell in the group of cells A1 maintains the orientation of the uneven structure in each cell and maintains the arrangement order of each cell from the center of the concentric circle to the outer edge.
A display device characterized in that each cell of the cell A1 of the first group is moved in parallel and rearranged in an arbitrary angular direction with the center of the concentric circle as the center of rotation. In the cell A group consisting of the two or more groups of cells A1, the positions of the rotation centers of the cells A1 in the group are arranged at different positions.
The display device according to claim 1, wherein a pattern including numbers, letters, symbols, and patterns is arranged so as to be displayable. When the concentric concavo-convex structure provided in the Frenel lens shape is divided into an arbitrary number and the rearranged concavo-convex structure is irradiated with light from an arbitrary position using a light source, the light source and the concentric circle A high-intensity image point is observed at a position shifted in the angular direction in which the cell is moved in parallel from the direction facing the center, and when the light source is moved, the light source is moved according to the moving direction of the light source. The display device according to claim 1 or 2, wherein the movement of the high-brightness image point is observed. The plurality of cells further include cell B group.
The display device according to any one of claims 1 to 3, 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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