JPH0747696Y2 - Instruments with hologram - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an instrument with a hologram.

[Problems to be solved by conventional techniques and devices]

Holography is a new technology that records and reproduces the state of the wavefront of light from an object, and is a hologram created by this technique (the state of the wavefront of light from an object in the form of interference fringes caused by light interference). According to the recorded material), a stereoscopic image can be reproduced and multiple recording can be performed. In addition, as one method of recording a hologram, interference fringes can be recorded on the surface of the material in the form of minute irregularities, and this hologram can be easily mass-produced.

By the way, conventionally, for example, measuring instruments such as car speedometers and various indicators, especially the numerical value display portion and image display portion thereof are provided with various cosmetic devices in order to enhance their aesthetics and design value. However, in any case, there is a problem in that it is too flat, and therefore an excellent high-class feeling cannot be exhibited.

[Means for solving problems]

The present inventors have arrived at the present invention as a result of research for imparting superior cosmetic and design effects to conventional instruments.

That is, in the instrument with hologram of the present invention, a hologram is provided on a part or the whole surface of the instrument, and the hologram has a hologram layer provided with a minute uneven shape and a surface on which the minute uneven shape of the hologram layer is formed. The refractive index of the hologram layer laminated on is a transparent reflection hologram composed of a hologram effect layer made of a transparent material having a different refractive index.

In the instrument with hologram, the hologram can be provided on a part or the entire surface of the display plate of the instrument, or can be provided on a part or the entire surface of the protective plate of the instrument. Further, in the instrument with hologram, the hologram layer of the hologram can be formed by using an ultraviolet curable resin having thermoformability, an electron beam curable resin or a thermosetting resin, and the above ultraviolet curable resin, It is preferable that the electron beam curable resin or the thermosetting resin is solid at room temperature before curing and has thermoformability.

〔Example〕

Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings.

As a hologram used in the instrument with hologram of the present invention, as shown in FIGS. 3 and 4, a hologram layer 5 provided with a minute uneven shape of a hologram and a minute uneven shape of the hologram layer 5 are formed. The hologram effect layer 6 is laminated on the upper surface, and the hologram effect layer 6 is made of a transparent material having a refractive index different from that of the hologram layer 5. The minute uneven shape of the hologram may be formed of a photosensitive material or embossed duplication. An image hologram, a rainbow hologram, a holographic stereogram, a diffraction grating, or the like can be used as a specific type of this hologram. The hologram in the present invention is a transparent reflection type hologram, which is reproduced at a specific angle by reflected light of incident light, and looks transparent except at the angle at which the hologram is reproduced.

The instrument 1 with a hologram shown in FIG. 1 has a display plate 2 on which a speed display is formed as shown in the sectional view of FIG.
And a protective plate 3 for protecting the surface of the display plate 2, and a hologram 4 is formed over the entire surface of the display plate 2.

As shown in FIG. 3, the hologram 4 is composed of a hologram layer 5 and a hologram effect layer 6 laminated on the surface of the hologram layer 5 having minute irregularities, and the hologram effect layer 6 side is provided with an adhesive layer 8 on the display plate. It is glued to 2.

FIG. 4 shows a case in which the hologram effect layer 6 is provided on the surface of the hologram layer 5 having minute irregularities, and the surface of the hologram layer 5 on which the minute irregularities are not formed is adhered to the display panel 2 via the adhesive layer 8. Indicates. Hereinafter, each constituent material will be described in more detail.

As the display plate 2, all conventionally known materials such as metal, plastics, glass and composite materials used as the display plate material can be used. The protective plate 3 is also the display plate 2
Although a material similar to the above can be used, a transparent material is usually used. Although not shown, the display board 2 may be provided with various decorations according to other conventional techniques.

The hologram layer 5 is made of a photosensitive material for hologram or an embossed hologram forming material. The hologram layer 5 can be colored if necessary.

The thickness of the hologram layer 5 is appropriately selected depending on the size of the display plate 2 and the type of hologram, but is usually 0.1 to 50 μm.
m, preferably 0.5 to 5 μm.

An embossed hologram is suitable for the present invention, and the resin for this embossed hologram can be thermoformed at the time of forming (reproduction) of the hologram. Those having resistance to withstand a solvent are preferable. Examples of such resin include so-called ultraviolet curable resin, electron beam curable resin,
Reactive resins such as thermosetting resins and natural setting resins may be used. In particular, when productivity is taken into consideration, a resin curable with ultraviolet rays or electron beams is suitable.

Specifically, for example, methyl (meth) acrylate [note that
The term (meth) acrylate is meant to include both acrylates and methacrylates. The same shall apply hereinafter], ethyl (meth) acrylate, propyl (meth)
Acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth)
Acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tetra (meth) Acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene glycol diglycidyl ether di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol diglycidyl ether di (meth) acrylate, polypropylene Glycol diglycidyl ether di (meth) acrylate, sorbitol tetraglycidyl ether tetra (meth) ) May monomer is used having a radical polymerizable unsaturated group such as acrylate.

Further, as an ultraviolet ray or electron beam curable resin having thermoformability, a method (a) to be described later can be applied to a polymer obtained by polymerizing or copolymerizing the following compounds (1) to (8).
What introduced the radical polymerizable unsaturated group by (d) is used.

(1) Monomer having hydroxyl group: N-methylol (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroquitebutyl (meth) acrylate, 2-hydroxy- 3-phenoxypropyl (meth) acrylate and the like.

(2) Monomer having carboxyl group: (meth) acrylic acid, (meth) acryloyloxyethyl monosuccinate and the like.

(3) Epoxy group-containing monomer: Glycidyl (meth) acrylate and the like.

(4) Monomer having aziridinyl group: 2-aziridinylethyl (meth) acrylate, allyl 2-aziridinylpropionate and the like.

(5) Monomers having amino groups: (meth) acrylamide, diacetone (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate and the like.

(6) Monomer having sulfone group: 2- (meth) acrylamido-2-methylpropanesulfonic acid and the like.

(7) Monomer having isocyanate group: Addition of a diisocyanate such as an adduct of 2,4-toluene diisocyanate and 2-hydroxyethyl (meth) acrylate with respect to 1 mol and a radical polymerizable monomer having active hydrogen. Things etc.

(8) Further, in order to control the glass transition point of the above copolymer or the physical properties of a cured film, the above compound and the following monomer copolymerizable with this compound And can be copolymerized. Examples of such copolymerizable monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth). ) Acrylate, isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate and the like.

Next, the polymer obtained as described above is reacted by the following methods (a) to (d) to introduce a radically polymerizable unsaturated group to obtain an ultraviolet or electron beam curable resin. .

(A) In the case of a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as (meth) acrylic acid is subjected to a condensation reaction.

(B) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the above-mentioned monomer having a hydroxyl group is subjected to a condensation reaction.

(C) In the case of a polymer or copolymer of a monomer having an epoxy group, an isocyanate group or an aziridinyl group, the above-mentioned monomer having a hydroxyl group or a monomer having a carboxyl group is subjected to an addition reaction.

(D) In the case of a polymer or copolymer of a monomer having a hydroxyl group or a carboxyl group, a monomer having an epoxy group, a monomer having an aziridinyl group or a diisocyanate compound and a hydroxyl group-containing acrylic acid ester unit amount The addition reaction may be carried out with an adduct of 1 to 1 mol of the body.

Further, the above-mentioned monomer and the thermoformable ultraviolet ray or electron beam curable resin may be mixed and used.

Also, the above can be sufficiently cured by electron beam irradiation, but when cured by ultraviolet irradiation, as a sensitizer,
It is also possible to use benzoin ethers such as benzoquinone, benzoin and benzoin methyl ether, and halogen radical acetophenones that generate radicals upon irradiation with ultraviolet rays.

The hologram effect layer 6 is made of a transparent material having a refractive index different from that of the resin of the hologram layer 5 (usually, the refractive index n = 1.3 to 1.6). It may be larger or smaller, but the difference in refractive index is 0.1 or more, more preferably 0.5 or more, particularly 1.0
The above is preferable.

As the transparent material, an inorganic compound, a resin or the like is used,
For example, the following may be mentioned (hereinafter, the refractive index: n is added in parentheses to the right of the material name).

Inorganic compounds include Sb ₂ S ₃ (3.0), Fe ₂ O ₃ (2.7), PbO
(2.6), ZnSe (2.6), CdS (2.6), Bi ₂ O ₂ (2.4), Ti
O ₂ (2.3), PbCl ₂ (2.3), CeO ₂ (2.2), Ta ₂ O ₅ (2.
2), ZnS (2.1), ZnO (2.1), CdO (2.1), Nd ₂ O ₃ (2.
1), Sb ₂ O ₃ (2.0), ZrO ₂ (2.0), WO ₃ (2.0), Pr ₆ O ₁₁
(2.0), SiO (2.0), In ₂ O ₃ (2.0), Y ₂ O ₃ (1.9), Ti
O (1.9), ThO ₂ (1.9), Si ₂ O ₃ (1.9), PbF ₂ (1.8),
Cd ₂ O ₃ (1.8), La ₂ O ₃ (1.8), MgO (1.7), Al ₂ O ₃ (1.
6), LaF ₃ (1.6), CaO ・ SiO ₂ (1.6), CeF ₃ (1.6), N
dF ₃ (1.6), SiO ₂ (1.5), SiO ₃ (1.5), ThF ₄ (1.
5), CdSe (3.5), CdTe (2.6), Ge (4.0-4.4), HfO
₂ (2.2), PbTe (5.6), Si (3.4), Te (4.9), TlCl
(2.6), ZnTe (2.8), CuCl (2.0), CuBr (2.2), Ga
As (3.3 to 3.6), GaP (3.3 to 3.5), N ₄ (CH ₂ ) ₆ (1.6),
Bi ₄ (GeO ₄ ) ₃ (2.1), KH ₂ PO ₄ (KDP) (1.5), KD ₂ PO
₄ (1.5), NH ₄ H ₂ PO ₄ (1.5), KH ₂ AsO ₄ (1.6), RbH ₂ AsO
₄ (1.6), KTa _0.65 Nb _0.35 O ₃ (2.3), K _0.6 Li _0.4 NbO
₃ (2.3), KSr ₂ Nb ₅ O ₁₅ (2.3), Sr _x Ba _1-x Nb ₂ O ₆ (2.
3), Ba ₂ NaNbO ₁₅ (2.3), LiNbO ₃ (2.3), LiTaO ₃ (2.
2), BaTiO ₃ (2.4), SrTiO ₃ (2.4), KTaO ₃ (2.2), L
iF (1.4), MgF (1.4), 3NaF ・ AlF ₃ (1.4), AlF ₃ (1.
4), GaF ₂ (1.3), NaF (1.3) and the like. As the resin, polytetrafluoroethylene (1.35), polychlorotrifluoroethylene (1.43), vinyl acetate resin (1.45 to 1.47), polyethylene (1.50), polypropylene (1.49), methyl methacrylate resin (1.49), nylon (1.53 ), Polystyrene (1.60), polyvinylidene chloride (1.60 to 1.63), vinyl butyral resin (1.48),
Vinyl formal resin (1.50), polyvinyl chloride (1.52
To 1.55), polyester resin (1.52 to 1.57), carboxylic acid formalin resin (1.5 to 1.7) and the like. The hologram effect layer 6 may be formed by using these inorganic compounds or resins alone, or may be used in an appropriate combination. The thickness of the hologram effect layer 6 composed of the above-mentioned inorganic compound and resin is preferably 10 to 10,000, particularly preferably 100 to 5,000Å.

The adhesive layer 8 is a hologram layer 5 and a hologram effect layer 6.
Plays a role of adhering to the display board 2. As the adhesive, those known as conventional adhesives such as acrylic resin, pinyl resin, polyester resin, urethane resin, amide resin, and epoxy resin can be widely used.
The thickness of the adhesive layer 8 is 0.1 to 50 μm, preferably 0.5.
It is preferably ˜10 μm.

An anchor layer (not shown) may be provided between the hologram forming layer 6 and the adhesive layer 8 in order to enhance the adhesiveness between them.

Next, a method of manufacturing instruments with hologram according to the present invention will be described.

As a method of providing the hologram 4 on the display board 2, adhesion,
Appropriate known sticking means such as sticking and fusing may be used, and a transfer method is preferably used.

Hereinafter, an example of the case where the hologram-equipped instruments in which the hologram 4 is laminated on the display plate 2 is manufactured by this transfer method will be described.

First, a hologram transfer sheet 9 as shown in FIG. 5 is prepared. In order to create this hologram transfer sheet 9, first, on the hologram transfer sheet base material 10, if necessary, a release layer 11 and an overprint layer 12, and an ultraviolet ray or electron beam curable resin having thermoformability, for example. A layer or a thermosetting resin layer having thermoformability is provided to form a hologram forming film. Among the above resins, an ultraviolet ray or electron beam curable resin which is solid at room temperature before curing and has thermoformability is preferable.

Next, the obtained hologram-forming film and a hologram master plate on which minute irregularities are formed are heated and pressure-contacted so that the resin layer of the film is in contact with the hologram master plate, while forming the minute irregularities on the resin surface, Alternatively, thereafter, the resin is cured by irradiating with ultraviolet rays or electron beams or by further applying heat.

When heating and pressing the hologram original plate and the hologram forming film, a heating and pressing means such as a heating roll can be used, in which case the temperature of the heating roll depends on the type of resin to be used, the material of the base film, the thickness, etc. Although it varies greatly, it is generally suitable that the temperature is 100 to 200 ° C. Further, it is preferable that the hologram original plate and the hologram-forming film are brought into pressure contact with each other under a pressure of 0.1 kg / cm ² or more, preferably 1 kg / cm ² or more.

At this time, ultraviolet rays or electron beams may be irradiated. Also, the film on which the minute irregularities of the hologram formed on the hologram master plate are transferred may be peeled from the hologram master plate and then irradiated again with ultraviolet rays or electron beams. The irradiation intensity should be a strength that can sufficiently cure the resin. Is preferred. Irradiation with ultraviolet rays or electron beams needs to be appropriately determined according to the resin used. The hologram layer 5 is formed as described above.

Next, the hologram effect layer 6 is applied. These layers can be provided on the hologram layer 5 by a sputtering method, an ion plating method, a vacuum vapor deposition method, or the like.

Next, an anchor layer is provided on the hologram effect layer 6 if necessary, and then an adhesive layer 8 is provided by a coating method or the like to obtain a hologram transfer sheet 9.

Incidentally, the type of ultraviolet curable resin and electron beam curable resin that have been conventionally used are generally in a liquid state, and thus are extremely sticky when applied on a base film, and therefore, conventional ultraviolet rays or The hologram forming film formed by applying the electron beam curable resin cannot be wound up and stored, and the hologram forming film is formed by applying the ultraviolet curable resin on the base film immediately before contact with the hologram master plate. However, since the hologram forming film as described above is formed of a specific resin, it has the advantage that it can be rolled up and stored without stickiness. Have

Next, the hologram transfer sheet 9 and the display plate 2 having the above-mentioned configurations are attached to the hologram transfer sheet 9 and the adhesive layer 8
And the display plate 2 are brought into contact with each other by heating and pressure, the hologram layer 5 and the hologram effect layer 6 of the hologram transfer sheet 9 are transferred onto the display plate 2, and after the transfer, a molten resin is further applied to the hologram surface side if necessary. A transparent protective layer 13 may be provided as shown in FIG. 6 by pouring and cooling molding (so-called two-color molding). The protective layer 13 can be formed by a method of laminating a transparent plastic film, a sheet, glass or the like in addition to the above-mentioned two-color molding.

When transferring the hologram, the hologram transfer sheet 9 is used.
The display plate 2 and the display plate 2 are preferably heated and pressure-welded at a temperature of 100 to 200 ° C. under a pressure of 5 to 50 kg / cm ² .

Although the hologram 4 is provided on the entire surface of the display plate 2 in the above embodiment, the hologram 4 may be provided on a part of the display plate 2. Further, as shown in FIG. 7, the hologram 4 may be provided on the entire surface or a part (not shown) of the protective plate 3. Further, the hologram 4 may be provided on a part or the entire surface of the instrument other than the display plate 2 and the protective plate 3.

The hologram of the present invention is a transparent reflection hologram in which the hologram effect layer formed on the minute irregularities of the hologram formation layer is made of a transparent material having a refractive index different from that of the hologram formation layer. Shows the following action as compared with the case where a hologram having only a minute concavo-convex shape without a hologram effect layer and the case where an opaque reflective metal thin film layer is provided.

Since a hologram in which minute irregularities of a hologram are formed generally uses a resin as a hologram forming layer, incident light is partially reflected by the resin layer and partly transmitted through the resin layer. Also becomes. When it is provided with a hologram effect layer made of a transparent material, the incident light is the surface reflection (r1) of the hologram effect layer and the internal reflection (r2) and transmitted light (r2) occurring at the interface between the hologram effect layer and the hologram layer. t) and (though there is actually absorption of light). When the hologram is viewed from the incident light side, the reflected light from the hologram forming body is the surface reflected light plus the internal reflected light (r1 + r2). Further, since the hologram effect layer is formed as a thin film layer, an interference effect due to the thin film of the hologram effect layer is added to the reflected light, and the reflected light seen from the incident light side is further increased to obtain a larger reflected light. . On the other hand, in the case of a hologram having only minute concavo-convex shapes, reflection (r1 and r2) by the hologram effect layer does not occur at all, and thus extremely small reflected light can be obtained. Further, when an opaque reflective metal thin film is provided, the reflected light becomes large, but the hologram becomes opaque and the lower layer is hidden and invisible.

In addition, when the hologram is fixed to a display plate or a protective plate using an adhesive, the adhesive is directly applied to the fine uneven surface if the hologram effect layer having a refractive index different from that of the hologram layer is not formed. Will be covered with adhesive. Since the hologram layer and the adhesive are generally made of resin, the refractive index of the adhesive resin and the refractive index of the hologram layer resin are usually in the range of 1.4 to 1.5. There is no difference in the refractive index between the two materials forming the boundary surface of the uneven surface, and the uneven surface hardly causes reflection, which makes it difficult to reproduce the hologram image well.

[Effect of device]

Since the hologram-equipped instruments according to the present invention are provided with the hologram on a part or the entire surface of the instruments, the following effects can be obtained.

(B) The instruments have a three-dimensional visual sensation, which further improves the aesthetics, decorativeness, and luxury. Further, in the present invention, since the hologram is a transparent reflection type hologram, the hologram image can be seen from the incident light side by the reflected light at a specific angle, and at the angle where the hologram image is not reproduced, it is transparent and the lower layer is hidden. Since it can be seen without a glance, the design of the lower layer can be seen from above even though the hologram is provided. Further, when the minute unevenness side of the hologram is adhered to the display plate or the protective layer is provided on the minute unevenness side, since the hologram effect layer having a refractive index different from that of the hologram layer is provided on the minute unevenness, A good hologram can be reproduced without the difference in the refractive index at the interface.

(B) When an ultraviolet curable resin, an electron beam curable resin or a thermosetting resin having thermoformability is used as the hologram forming resin, the hologram can be easily formed with thermoformability when forming the hologram. At the same time, it has excellent heat resistance when the hologram is attached, and heat can be applied to attach the hologram.

[Brief description of drawings]

FIG. 1 is a plan view of instruments with a hologram according to the present invention,
2 is a vertical sectional view taken along the line II-II in FIG. 1, FIGS. 3 to 4 are vertical sectional views showing different configurations of holograms, and FIG. 5 is a vertical sectional view of a hologram transfer sheet. FIG. 7 is a vertical cross-sectional view showing a different configuration of the hologram, and FIG. 7 is a vertical cross-sectional view showing a different mode of the instrument with hologram formed by laminating the hologram on the protective plate. 1 ... Instruments with hologram 2 ... Display plate, 3 ... Protective plate 4 ... Hologram, 5 ... Hologram layer 6 ... Hologram effect layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-160278 (JP, A) JP-A-53-4576 (JP, A) JP-A-53-76073 (JP, A) Actual development Sho-57- 139983 (JP, U) Actual opening 61-8170 (JP, U) Actual opening 60-169179 (JP, U) Actual opening 59-149910 (JP, U)

Claims (5)

[Scope of utility model registration request] 1. A hologram is provided on a part or the entire surface of an instrument, and the hologram is laminated on a hologram layer having a minute uneven shape and on a surface of the hologram layer having the minute uneven shape. An instrument with a hologram, which is a transparent reflection hologram comprising a hologram effect layer made of a transparent material having a refractive index different from that of the hologram layer. 2. The instrument with a hologram according to claim 1, wherein the hologram is provided on a part or the whole of the display plate of the instrument. 3. The instrument with a hologram according to claim 1, wherein the hologram is provided on a part or the entire surface of a protective plate of the instrument. 4. A utility model registration claim in which a hologram layer of a hologram is molded using an ultraviolet curable resin, an electron beam curable resin or a thermosetting resin having thermoformability. Instruments with hologram according to any one. 5. A utility model registration claim wherein the ultraviolet curable resin, the electron beam curable resin or the thermosetting resin is solid at room temperature before curing and has thermoformability.
Instruments with hologram according to the item.